21222012202 has 16 divisors (see below), whose sum is σ = 32361073920. Its totient is φ = 10436134752.

The previous prime is 21222012197. The next prime is 21222012221. The reversal of 21222012202 is 20221022212.

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, 249627 + ... + 323662.

It is an arithmetic number, because the mean of its divisors is an integer number (2022567120).

Almost surely, 2^21222012202 is an apocalyptic number.

21222012202 is a deficient number, since it is larger than the sum of its proper divisors (11139061718).

21222012202 is a wasteful number, since it uses less digits than its factorization.

21222012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573597.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21222012202 its reverse (20221022212), we get a palindrome (41443034414).

It can be divided in two parts, 212220 and 12202, that added together give a palindrome (224422).

The spelling of 21222012202 in words is "twenty-one billion, two hundred twenty-two million, twelve thousand, two hundred two".