21002012202 has 16 divisors (see below), whose sum is σ = 42692615712. Its totient is φ = 6885905520.

The previous prime is 21002012201. The next prime is 21002012209. The reversal of 21002012202 is 20221020012.

It is not an unprimeable number, because it can be changed into a prime (21002012201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28690908 + ... + 28691639.

It is an arithmetic number, because the mean of its divisors is an integer number (2668288482).

Almost surely, 2^21002012202 is an apocalyptic number.

21002012202 is an abundant number, since it is smaller than the sum of its proper divisors (21690603510).

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

21002012202 is a wasteful number, since it uses less digits than its factorization.

21002012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57382613.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002012202 its reverse (20221020012), we get a palindrome (41223032214).

It can be divided in two parts, 210020 and 12202, that added together give a palindrome (222222).

The spelling of 21002012202 in words is "twenty-one billion, two million, twelve thousand, two hundred two".