111102212021021 has 32 divisors (see below), whose sum is σ = 124248273625728. Its totient is φ = 98710063119360.

The previous prime is 111102212020973. The next prime is 111102212021023. The reversal of 111102212021021 is 120120212201111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111102212021021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102212021023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1361840 + ... + 14968601.

It is an arithmetic number, because the mean of its divisors is an integer number (3882758550804).

Almost surely, 2^{111102212021021} is an apocalyptic number.

It is an amenable number.

111102212021021 is a deficient number, since it is larger than the sum of its proper divisors (13146061604707).

111102212021021 is a wasteful number, since it uses less digits than its factorization.

111102212021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16330701.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111102212021021 its reverse (120120212201111), we get a palindrome (231222424222132).

The spelling of 111102212021021 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, twenty-one thousand, twenty-one".