121120102021111 has 16 divisors (see below), whose sum is σ = 123330960406144. Its totient is φ = 118921722014304.

The previous prime is 121120102021099. The next prime is 121120102021123. The reversal of 121120102021111 is 111120201021121.

It is an interprime number because it is at equal distance from previous prime (121120102021099) and next prime (121120102021123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121120102021111 is a prime.

It is a super-2 number, since 2×121120102021111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120102022111) 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, 23327260 + ... + 28042846.

It is an arithmetic number, because the mean of its divisors is an integer number (7708185025384).

Almost surely, 2^{121120102021111} is an apocalyptic number.

121120102021111 is a deficient number, since it is larger than the sum of its proper divisors (2210858385033).

121120102021111 is an equidigital number, since it uses as much as digits as its factorization.

121120102021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716910.

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

Adding to 121120102021111 its reverse (111120201021121), we get a palindrome (232240303042232).

The spelling of 121120102021111 in words is "one hundred twenty-one trillion, one hundred twenty billion, one hundred two million, twenty-one thousand, one hundred eleven".