121010021120111 has 4 divisors (see below), whose sum is σ = 123824207657832. Its totient is φ = 118195834582392.

The previous prime is 121010021119969. The next prime is 121010021120141. The reversal of 121010021120111 is 111021120010121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121010021120111 - 2¹⁸ = 121010020857967 is a prime.

It is a super-2 number, since 2×121010021120111² (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 (121010021120141) 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, 1407093268796 + ... + 1407093268881.

It is an arithmetic number, because the mean of its divisors is an integer number (30956051914458).

Almost surely, 2^{121010021120111} is an apocalyptic number.

121010021120111 is a deficient number, since it is larger than the sum of its proper divisors (2814186537721).

121010021120111 is an equidigital number, since it uses as much as digits as its factorization.

121010021120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814186537720.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121010021120111 its reverse (111021120010121), we get a palindrome (232031141130232).

The spelling of 121010021120111 in words is "one hundred twenty-one trillion, ten billion, twenty-one million, one hundred twenty thousand, one hundred eleven".