121321421402 has 16 divisors (see below), whose sum is σ = 185582145600. Its totient is φ = 59466434880.

The previous prime is 121321421371. The next prime is 121321421479. The reversal of 121321421402 is 204124123121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389599 + ... + 1474322.

It is an arithmetic number, because the mean of its divisors is an integer number (11598884100).

Almost surely, 2^121321421402 is an apocalyptic number.

121321421402 is a deficient number, since it is larger than the sum of its proper divisors (64260724198).

121321421402 is a wasteful number, since it uses less digits than its factorization.

121321421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864341.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121321421402 its reverse (204124123121), we get a palindrome (325445544523).

The spelling of 121321421402 in words is "one hundred twenty-one billion, three hundred twenty-one million, four hundred twenty-one thousand, four hundred two".