121010021011 has 16 divisors (see below), whose sum is σ = 133809223680. Its totient is φ = 108519432480.

The previous prime is 121010020991. The next prime is 121010021017. The reversal of 121010021011 is 110120010121.

It is a cyclic number.

It is not a de Polignac number, because 121010021011 - 2²⁷ = 120875803283 is a prime.

It is a super-2 number, since 2×121010021011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121010021017) 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, 49870 + ... + 494476.

It is an arithmetic number, because the mean of its divisors is an integer number (8363076480).

Almost surely, 2^121010021011 is an apocalyptic number.

121010021011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121010021011 is a deficient number, since it is larger than the sum of its proper divisors (12799202669).

121010021011 is a wasteful number, since it uses less digits than its factorization.

121010021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444954.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121010021011 its reverse (110120010121), we get a palindrome (231130031132).

The spelling of 121010021011 in words is "one hundred twenty-one billion, ten million, twenty-one thousand, eleven".