20111121011012 has 12 divisors (see below), whose sum is σ = 35194532923536. Its totient is φ = 10055540175720.

The previous prime is 20111121010931. The next prime is 20111121011029. The reversal of 20111121011012 is 21011012111102.

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 3 ways as a sum of consecutive naturals, for example, 2736314 + ... + 6907217.

It is an arithmetic number, because the mean of its divisors is an integer number (2932877743628).

Almost surely, 2^{20111121011012} is an apocalyptic number.

It is an amenable number.

20111121011012 is a deficient number, since it is larger than the sum of its proper divisors (15083411912524).

20111121011012 is a wasteful number, since it uses less digits than its factorization.

20111121011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164898 (or 10164896 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20111121011012 its reverse (21011012111102), we get a palindrome (41122133122114).

The spelling of 20111121011012 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, eleven thousand, twelve".