20311011212 has 24 divisors (see below), whose sum is σ = 37102281216. Its totient is φ = 9710659728.

The previous prime is 20311011211. The next prime is 20311011223. The reversal of 20311011212 is 21211011302.

It is not an unprimeable number, because it can be changed into a prime (20311011211) 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, 246173 + ... + 318155.

It is an arithmetic number, because the mean of its divisors is an integer number (1545928384).

Almost surely, 2^20311011212 is an apocalyptic number.

It is an amenable number.

20311011212 is a deficient number, since it is larger than the sum of its proper divisors (16791270004).

20311011212 is a wasteful number, since it uses less digits than its factorization.

20311011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75077 (or 75075 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20311011212 its reverse (21211011302), we get a palindrome (41522022514).

The spelling of 20311011212 in words is "twenty billion, three hundred eleven million, eleven thousand, two hundred twelve".