21010222212 has 48 divisors (see below), whose sum is σ = 56050468992. Its totient is φ = 6000433920.

The previous prime is 21010222187. The next prime is 21010222237. The reversal of 21010222212 is 21222201012.

It is an interprime number because it is at equal distance from previous prime (21010222187) and next prime (21010222237).

It is a junction number, because it is equal to n+sod(n) for n = 21010222191 and 21010222200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157162 + ... + 258302.

It is an arithmetic number, because the mean of its divisors is an integer number (1167718104).

Almost surely, 2^21010222212 is an apocalyptic number.

It is an amenable number.

21010222212 is an abundant number, since it is smaller than the sum of its proper divisors (35040246780).

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

21010222212 is a wasteful number, since it uses less digits than its factorization.

21010222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103628 (or 103626 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21010222212 its reverse (21222201012), we get a palindrome (42232423224).

The spelling of 21010222212 in words is "twenty-one billion, ten million, two hundred twenty-two thousand, two hundred twelve".