20121122012 has 36 divisors (see below), whose sum is σ = 36421849800. Its totient is φ = 9726029280.

The previous prime is 20121122011. The next prime is 20121122027. The reversal of 20121122012 is 21022112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121122011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4906739 + ... + 4910837.

It is an arithmetic number, because the mean of its divisors is an integer number (1011718050).

Almost surely, 2^20121122012 is an apocalyptic number.

It is an amenable number.

20121122012 is a deficient number, since it is larger than the sum of its proper divisors (16300727788).

20121122012 is a wasteful number, since it uses less digits than its factorization.

20121122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442 (or 5409 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20121122012 its reverse (21022112102), we get a palindrome (41143234114).

The spelling of 20121122012 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, twelve".