21222210021010 has 16 divisors (see below), whose sum is σ = 38295239835672. Its totient is φ = 8467714720000.

The previous prime is 21222210020941. The next prime is 21222210021031. The reversal of 21222210021010 is 1012001222212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18221142316129 + 3001067704881 = 4268623^2 + 1732359^2 .

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, 2646156841 + ... + 2646164860.

Almost surely, 2^{21222210021010} is an apocalyptic number.

21222210021010 is a deficient number, since it is larger than the sum of its proper divisors (17073029814662).

21222210021010 is a wasteful number, since it uses less digits than its factorization.

21222210021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292322109.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222210021010 its reverse (1012001222212), we get a palindrome (22234211243222).

The spelling of 21222210021010 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, twenty-one thousand, ten".