121525402411 has 16 divisors (see below), whose sum is σ = 147065587200. Its totient is φ = 98030874240.

The previous prime is 121525402391. The next prime is 121525402417. The reversal of 121525402411 is 114204525121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121525402411 is a prime.

It is a super-2 number, since 2×121525402411² (a number of 23 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 121525402411.

It is not an unprimeable number, because it can be changed into a prime (121525402417) 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, 2778490 + ... + 2821888.

It is an arithmetic number, because the mean of its divisors is an integer number (9191599200).

Almost surely, 2^121525402411 is an apocalyptic number.

121525402411 is a deficient number, since it is larger than the sum of its proper divisors (25540184789).

121525402411 is a wasteful number, since it uses less digits than its factorization.

121525402411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66954.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 121525402411 its reverse (114204525121), we get a palindrome (235729927532).

The spelling of 121525402411 in words is "one hundred twenty-one billion, five hundred twenty-five million, four hundred two thousand, four hundred eleven".