20111331212 has 24 divisors (see below), whose sum is σ = 40233333504. Its totient is φ = 8616855312.

The previous prime is 20111331181. The next prime is 20111331319. The reversal of 20111331212 is 21213311102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14363 + ... + 201069.

It is an arithmetic number, because the mean of its divisors is an integer number (1676388896).

Almost surely, 2^20111331212 is an apocalyptic number.

It is an amenable number.

20111331212 is an abundant number, since it is smaller than the sum of its proper divisors (20122002292).

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

20111331212 is a wasteful number, since it uses less digits than its factorization.

20111331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190565 (or 190563 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20111331212 its reverse (21213311102), we get a palindrome (41324642314).

The spelling of 20111331212 in words is "twenty billion, one hundred eleven million, three hundred thirty-one thousand, two hundred twelve".