20111121121012 has 24 divisors (see below), whose sum is σ = 35238554105216. Its totient is φ = 10042969292928.

The previous prime is 20111121120977. The next prime is 20111121121031. The reversal of 20111121121012 is 21012112111102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11620348 + ... + 13238380.

Almost surely, 2^{20111121121012} is an apocalyptic number.

It is an amenable number.

20111121121012 is a deficient number, since it is larger than the sum of its proper divisors (15127432984204).

20111121121012 is a wasteful number, since it uses less digits than its factorization.

20111121121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621927 (or 1621925 counting only the distinct ones).

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

Adding to 20111121121012 its reverse (21012112111102), we get a palindrome (41123233232114).

The spelling of 20111121121012 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, twelve".