22201011100021 has 16 divisors (see below), whose sum is σ = 25576161340464. Its totient is φ = 19088913383424.

The previous prime is 22201011100019. The next prime is 22201011100031. The reversal of 22201011100021 is 12000111010222.

It can be written as a sum of positive squares in 8 ways, for example, as 30944679921 + 22170066420100 = 175911^2 + 4708510^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201011100021 - 2¹ = 22201011100019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201011099974 and 22201011100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201011100031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517798480 + ... + 517841353.

It is an arithmetic number, because the mean of its divisors is an integer number (1598510083779).

Almost surely, 2^{22201011100021} is an apocalyptic number.

It is an amenable number.

22201011100021 is a deficient number, since it is larger than the sum of its proper divisors (3375150240443).

22201011100021 is a wasteful number, since it uses less digits than its factorization.

22201011100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035639960.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22201011100021 its reverse (12000111010222), we get a palindrome (34201122110243).

The spelling of 22201011100021 in words is "twenty-two trillion, two hundred one billion, eleven million, one hundred thousand, twenty-one".