121231302111 has 6 divisors (see below), whose sum is σ = 175111880840. Its totient is φ = 80820868068.

The previous prime is 121231302109. The next prime is 121231302113. The reversal of 121231302111 is 111203132121.

121231302111 is a `hidden beast` number, since 1 + 21 + 231 + 302 + 111 = 666.

It is an interprime number because it is at equal distance from previous prime (121231302109) and next prime (121231302113).

It is not a de Polignac number, because 121231302111 - 2¹ = 121231302109 is a prime.

It is a super-2 number, since 2×121231302111² (a number of 23 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 (121231302113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6735072331 + ... + 6735072348.

Almost surely, 2^121231302111 is an apocalyptic number.

121231302111 is a deficient number, since it is larger than the sum of its proper divisors (53880578729).

121231302111 is a wasteful number, since it uses less digits than its factorization.

121231302111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13470144685 (or 13470144682 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121231302111 its reverse (111203132121), we get a palindrome (232434434232).

The spelling of 121231302111 in words is "one hundred twenty-one billion, two hundred thirty-one million, three hundred two thousand, one hundred eleven".