20111122312 has 16 divisors (see below), whose sum is σ = 37711674000. Its totient is φ = 10054675920.

The previous prime is 20111122303. The next prime is 20111122327. The reversal of 20111122312 is 21322111102.

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, 8562 + ... + 200737.

It is an arithmetic number, because the mean of its divisors is an integer number (2356979625).

Almost surely, 2^20111122312 is an apocalyptic number.

It is an amenable number.

20111122312 is a deficient number, since it is larger than the sum of its proper divisors (17600551688).

20111122312 is a wasteful number, since it uses less digits than its factorization.

20111122312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221316 (or 221312 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20111122312 its reverse (21322111102), we get a palindrome (41433233414).

The spelling of 20111122312 in words is "twenty billion, one hundred eleven million, one hundred twenty-two thousand, three hundred twelve".