121302120231 has 6 divisors (see below), whose sum is σ = 175214173680. Its totient is φ = 80868080148.

The previous prime is 121302120211. The next prime is 121302120287. The reversal of 121302120231 is 132021203121.

121302120231 is a `hidden beast` number, since 12 + 1 + 302 + 120 + 231 = 666.

It is not a de Polignac number, because 121302120231 - 2¹⁸ = 121301858087 is a prime.

It is a super-2 number, since 2×121302120231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302120211) 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, 6739006671 + ... + 6739006688.

It is an arithmetic number, because the mean of its divisors is an integer number (29202362280).

Almost surely, 2^121302120231 is an apocalyptic number.

121302120231 is a deficient number, since it is larger than the sum of its proper divisors (53912053449).

121302120231 is a wasteful number, since it uses less digits than its factorization.

121302120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478013365 (or 13478013362 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121302120231 its reverse (132021203121), we get a palindrome (253323323352).

The spelling of 121302120231 in words is "one hundred twenty-one billion, three hundred two million, one hundred twenty thousand, two hundred thirty-one".