21202231402 has 16 divisors (see below), whose sum is σ = 34714482912. Its totient is φ = 9631843920.

The previous prime is 21202231363. The next prime is 21202231447. The reversal of 21202231402 is 20413220212.

It is a super-3 number, since 3×21202231402³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21202231402.

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, 237393 + ... + 314260.

It is an arithmetic number, because the mean of its divisors is an integer number (2169655182).

Almost surely, 2^21202231402 is an apocalyptic number.

21202231402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21202231402 is a deficient number, since it is larger than the sum of its proper divisors (13512251510).

21202231402 is a wasteful number, since it uses less digits than its factorization.

21202231402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553413.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21202231402 its reverse (20413220212), we get a palindrome (41615451614).

The spelling of 21202231402 in words is "twenty-one billion, two hundred two million, two hundred thirty-one thousand, four hundred two".