20121022212 has 24 divisors (see below), whose sum is σ = 47020967616. Its totient is φ = 6696733728.

The previous prime is 20121022171. The next prime is 20121022213. The reversal of 20121022212 is 21222012102.

It is a junction number, because it is equal to n+sod(n) for n = 20121022191 and 20121022200.

It is not an unprimeable number, because it can be changed into a prime (20121022213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276048 + ... + 1291719.

It is an arithmetic number, because the mean of its divisors is an integer number (1959206984).

Almost surely, 2^20121022212 is an apocalyptic number.

It is an amenable number.

20121022212 is an abundant number, since it is smaller than the sum of its proper divisors (26899945404).

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

20121022212 is a wasteful number, since it uses less digits than its factorization.

20121022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568427 (or 2568425 counting only the distinct ones).

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

Adding to 20121022212 its reverse (21222012102), we get a palindrome (41343034314).

The spelling of 20121022212 in words is "twenty billion, one hundred twenty-one million, twenty-two thousand, two hundred twelve".