2011212020021 has 4 divisors (see below), whose sum is σ = 2129518609452. Its totient is φ = 1892905430592.

The previous prime is 2011212020011. The next prime is 2011212020071. The reversal of 2011212020021 is 1200202121102.

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 1164756819121 + 846455200900 = 1079239^2 + 920030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011212020021 - 2¹⁴ = 2011212003637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011212019978 and 2011212020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011212020011) 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, 59153294690 + ... + 59153294723.

It is an arithmetic number, because the mean of its divisors is an integer number (532379652363).

Almost surely, 2^{2011212020021} is an apocalyptic number.

It is an amenable number.

2011212020021 is a deficient number, since it is larger than the sum of its proper divisors (118306589431).

2011212020021 is a wasteful number, since it uses less digits than its factorization.

2011212020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118306589430.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2011212020021 its reverse (1200202121102), we get a palindrome (3211414141123).

The spelling of 2011212020021 in words is "two trillion, eleven billion, two hundred twelve million, twenty thousand, twenty-one".