121010021011111 has 4 divisors (see below), whose sum is σ = 127378969485400. Its totient is φ = 114641072536824.

The previous prime is 121010021011093. The next prime is 121010021011261. The reversal of 121010021011111 is 111110120010121.

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 121010021011111 - 2²³ = 121010012622503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010021011091 and 121010021011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010021011811) 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, 3184474237116 + ... + 3184474237153.

It is an arithmetic number, because the mean of its divisors is an integer number (31844742371350).

Almost surely, 2^{121010021011111} is an apocalyptic number.

121010021011111 is a deficient number, since it is larger than the sum of its proper divisors (6368948474289).

121010021011111 is an equidigital number, since it uses as much as digits as its factorization.

121010021011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6368948474288.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 121010021011111 its reverse (111110120010121), we get a palindrome (232120141021232).

The spelling of 121010021011111 in words is "one hundred twenty-one trillion, ten billion, twenty-one million, eleven thousand, one hundred eleven".