2011120021021 has 16 divisors (see below), whose sum is σ = 2188532315200. Its totient is φ = 1841777699328.

The previous prime is 2011120020961. The next prime is 2011120021033. The reversal of 2011120021021 is 1201200211102.

It is a cyclic number.

It is not a de Polignac number, because 2011120021021 - 2¹⁵ = 2011119988253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011120020992 and 2011120021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011120021061) 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, 12609366 + ... + 12767863.

It is an arithmetic number, because the mean of its divisors is an integer number (136783269700).

Almost surely, 2^{2011120021021} is an apocalyptic number.

It is an amenable number.

2011120021021 is a deficient number, since it is larger than the sum of its proper divisors (177412294179).

2011120021021 is a wasteful number, since it uses less digits than its factorization.

2011120021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25377388.

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

Adding to 2011120021021 its reverse (1201200211102), we get a palindrome (3212320232123).

The spelling of 2011120021021 in words is "two trillion, eleven billion, one hundred twenty million, twenty-one thousand, twenty-one".