121331002111 has 32 divisors (see below), whose sum is σ = 137603085120. Its totient is φ = 105971712000.

The previous prime is 121331002097. The next prime is 121331002147. The reversal of 121331002111 is 111200133121.

It is a happy number.

It is not a de Polignac number, because 121331002111 - 2²¹ = 121328904959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331002211) 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, 75783711 + ... + 75785311.

It is an arithmetic number, because the mean of its divisors is an integer number (4300096410).

Almost surely, 2^121331002111 is an apocalyptic number.

121331002111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121331002111 is a deficient number, since it is larger than the sum of its proper divisors (16272083009).

121331002111 is a wasteful number, since it uses less digits than its factorization.

121331002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121331002111 its reverse (111200133121), we get a palindrome (232531135232).

The spelling of 121331002111 in words is "one hundred twenty-one billion, three hundred thirty-one million, two thousand, one hundred eleven".