21122000222012 has 12 divisors (see below), whose sum is σ = 36968057651616. Its totient is φ = 10559698035840.

The previous prime is 21122000221957. The next prime is 21122000222023. The reversal of 21122000222012 is 21022200022112.

It is a happy number.

It is a super-2 number, since 2×21122000222012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325482293 + ... + 325547180.

It is an arithmetic number, because the mean of its divisors is an integer number (3080671470968).

Almost surely, 2^{21122000222012} is an apocalyptic number.

It is an amenable number.

21122000222012 is a deficient number, since it is larger than the sum of its proper divisors (15846057429604).

21122000222012 is a wasteful number, since it uses less digits than its factorization.

21122000222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651037588 (or 651037586 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21122000222012 its reverse (21022200022112), we get a palindrome (42144200244124).

The spelling of 21122000222012 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two thousand, twelve".