20121221022212 has 12 divisors (see below), whose sum is σ = 37065407146320. Its totient is φ = 9531104694696.

The previous prime is 20121221022103. The next prime is 20121221022233. The reversal of 20121221022212 is 21222012212102.

It is a super-2 number, since 2×20121221022212² (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 3 ways as a sum of consecutive naturals, for example, 132376454018 + ... + 132376454169.

It is an arithmetic number, because the mean of its divisors is an integer number (3088783928860).

Almost surely, 2^{20121221022212} is an apocalyptic number.

It is an amenable number.

20121221022212 is a deficient number, since it is larger than the sum of its proper divisors (16944186124108).

20121221022212 is a wasteful number, since it uses less digits than its factorization.

20121221022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264752908210 (or 264752908208 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20121221022212 its reverse (21222012212102), we get a palindrome (41343233234314).

The spelling of 20121221022212 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, two hundred twelve".