121402213231 has 16 divisors (see below), whose sum is σ = 139752688320. Its totient is φ = 104576820480.

The previous prime is 121402213213. The next prime is 121402213243. The reversal of 121402213231 is 132312204121.

It is a cyclic number.

It is not a de Polignac number, because 121402213231 - 2¹³ = 121402205039 is a prime.

It is a super-2 number, since 2×121402213231² (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 (121402213631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4939296 + ... + 4963813.

It is an arithmetic number, because the mean of its divisors is an integer number (8734543020).

Almost surely, 2^121402213231 is an apocalyptic number.

121402213231 is a deficient number, since it is larger than the sum of its proper divisors (18350475089).

121402213231 is a wasteful number, since it uses less digits than its factorization.

121402213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9903186.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121402213231 its reverse (132312204121), we get a palindrome (253714417352).

The spelling of 121402213231 in words is "one hundred twenty-one billion, four hundred two million, two hundred thirteen thousand, two hundred thirty-one".