121212311302131 has 96 divisors (see below), whose sum is σ = 198264422458368. Its totient is φ = 65548111749120.

The previous prime is 121212311302087. The next prime is 121212311302141. The reversal of 121212311302131 is 131203113212121.

It is not a de Polignac number, because 121212311302131 - 2¹⁵ = 121212311269363 is a prime.

It is a super-2 number, since 2×121212311302131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121212311302141) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1023494586 + ... + 1023613008.

It is an arithmetic number, because the mean of its divisors is an integer number (2065254400608).

Almost surely, 2^{121212311302131} is an apocalyptic number.

121212311302131 is a deficient number, since it is larger than the sum of its proper divisors (77052111156237).

121212311302131 is a wasteful number, since it uses less digits than its factorization.

121212311302131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121681 (or 121674 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 121212311302131 its reverse (131203113212121), we get a palindrome (252415424514252).

The spelling of 121212311302131 in words is "one hundred twenty-one trillion, two hundred twelve billion, three hundred eleven million, three hundred two thousand, one hundred thirty-one".