121155112202131 has 16 divisors (see below), whose sum is σ = 138612755635200. Its totient is φ = 103734969676128.

The previous prime is 121155112202123. The next prime is 121155112202147. The reversal of 121155112202131 is 131202211551121.

It is a happy number.

It is not a de Polignac number, because 121155112202131 - 2³ = 121155112202123 is a prime.

It is a super-2 number, since 2×121155112202131² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121155112202131.

It is not an unprimeable number, because it can be changed into a prime (121155112208131) 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, 22510530 + ... + 27368488.

It is an arithmetic number, because the mean of its divisors is an integer number (8663297227200).

Almost surely, 2^{121155112202131} is an apocalyptic number.

121155112202131 is a deficient number, since it is larger than the sum of its proper divisors (17457643433069).

121155112202131 is a wasteful number, since it uses less digits than its factorization.

121155112202131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861818.

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 121155112202131 its reverse (131202211551121), we get a palindrome (252357323753252).

The spelling of 121155112202131 in words is "one hundred twenty-one trillion, one hundred fifty-five billion, one hundred twelve million, two hundred two thousand, one hundred thirty-one".