21220222012012 has 24 divisors (see below), whose sum is σ = 37350601898400. Its totient is φ = 10548623302656.

The previous prime is 21220222012007. The next prime is 21220222012037. The reversal of 21220222012012 is 21021022202212.

It is a super-2 number, since 2×21220222012012² (a number of 27 digits) contains 22 as substring.

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, 56146689 + ... + 56523367.

It is an arithmetic number, because the mean of its divisors is an integer number (1556275079100).

Almost surely, 2^{21220222012012} is an apocalyptic number.

It is an amenable number.

21220222012012 is a deficient number, since it is larger than the sum of its proper divisors (16130379886388).

21220222012012 is a wasteful number, since it uses less digits than its factorization.

21220222012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458265 (or 458263 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21220222012012 its reverse (21021022202212), we get a palindrome (42241244214224).

The spelling of 21220222012012 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, twelve thousand, twelve".