2111121002221 has 32 divisors (see below), whose sum is σ = 2718865391616. Its totient is φ = 1590842592000.

The previous prime is 2111121002197. The next prime is 2111121002227. The reversal of 2111121002221 is 1222001211112.

It is a cyclic number.

It is not a de Polignac number, because 2111121002221 - 2²³ = 2111112613613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111121002195 and 2111121002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111121002227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3085941 + ... + 3707461.

It is an arithmetic number, because the mean of its divisors is an integer number (84964543488).

Almost surely, 2^{2111121002221} is an apocalyptic number.

It is an amenable number.

2111121002221 is a deficient number, since it is larger than the sum of its proper divisors (607744389395).

2111121002221 is a wasteful number, since it uses less digits than its factorization.

2111121002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622993.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111121002221 its reverse (1222001211112), we get a palindrome (3333122213333).

The spelling of 2111121002221 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two thousand, two hundred twenty-one".