2201001031021 has 4 divisors (see below), whose sum is σ = 2370308802652. Its totient is φ = 2031693259392.

The previous prime is 2201001030997. The next prime is 2201001031043. The reversal of 2201001031021 is 1201301001022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 852139456996 + 1348861574025 = 923114^2 + 1161405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201001031021 - 2⁹ = 2201001030509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 169307771617 = 2201001031021 / (2 + 2 + 0 + 1 + 0 + 0 + 1 + 0 + 3 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201001030992 and 2201001031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201001031121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84653885796 + ... + 84653885821.

It is an arithmetic number, because the mean of its divisors is an integer number (592577200663).

Almost surely, 2^{2201001031021} is an apocalyptic number.

It is an amenable number.

2201001031021 is a deficient number, since it is larger than the sum of its proper divisors (169307771631).

2201001031021 is a wasteful number, since it uses less digits than its factorization.

2201001031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169307771630.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2201001031021 its reverse (1201301001022), we get a palindrome (3402302032043).

Subtracting from 2201001031021 its reverse (1201301001022), we obtain a cube (999700029999 = 9999³).

The spelling of 2201001031021 in words is "two trillion, two hundred one billion, one million, thirty-one thousand, twenty-one".