21230100402 has 16 divisors (see below), whose sum is σ = 48525943872. Its totient is φ = 6065742960.

The previous prime is 21230100391. The next prime is 21230100439. The reversal of 21230100402 is 20400103212.

21230100402 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 252739249 + ... + 252739332.

It is an arithmetic number, because the mean of its divisors is an integer number (3032871492).

Almost surely, 2^21230100402 is an apocalyptic number.

21230100402 is an abundant number, since it is smaller than the sum of its proper divisors (27295843470).

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

21230100402 is a wasteful number, since it uses less digits than its factorization.

21230100402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505478593.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21230100402 its reverse (20400103212), we get a palindrome (41630203614).

The spelling of 21230100402 in words is "twenty-one billion, two hundred thirty million, one hundred thousand, four hundred two".