210121321404 has 24 divisors (see below), whose sum is σ = 516087456640. Its totient is φ = 66354101424.

The previous prime is 210121321381. The next prime is 210121321429. The reversal of 210121321404 is 404123121012.

It is a congruent number.

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, 460792144 + ... + 460792599.

Almost surely, 2^210121321404 is an apocalyptic number.

It is an amenable number.

210121321404 is an abundant number, since it is smaller than the sum of its proper divisors (305966135236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121321404 is a wasteful number, since it uses less digits than its factorization.

210121321404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921584769 (or 921584767 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 210121321404 its reverse (404123121012), we get a palindrome (614244442416).

The spelling of 210121321404 in words is "two hundred ten billion, one hundred twenty-one million, three hundred twenty-one thousand, four hundred four".