121150231521 has 16 divisors (see below), whose sum is σ = 176599142400. Its totient is φ = 73265789520.

The previous prime is 121150231507. The next prime is 121150231529. The reversal of 121150231521 is 125132051121.

It is not a de Polignac number, because 121150231521 - 2⁶ = 121150231457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121150231491 and 121150231500.

It is not an unprimeable number, because it can be changed into a prime (121150231529) 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, 3949321 + ... + 3979878.

It is an arithmetic number, because the mean of its divisors is an integer number (11037446400).

Almost surely, 2^121150231521 is an apocalyptic number.

121150231521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121150231521 is a deficient number, since it is larger than the sum of its proper divisors (55448910879).

121150231521 is a wasteful number, since it uses less digits than its factorization.

121150231521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929676.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 121150231521 its reverse (125132051121), we get a palindrome (246282282642).

The spelling of 121150231521 in words is "one hundred twenty-one billion, one hundred fifty million, two hundred thirty-one thousand, five hundred twenty-one".