20111210121012 has 48 divisors (see below), whose sum is σ = 48968657861760. Its totient is φ = 6411977448448.

The previous prime is 20111210120977. The next prime is 20111210121049. The reversal of 20111210121012 is 21012101211102.

It is a happy number.

20111210121012 is a modest number, since divided by 10121012 gives 201112 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20111210120982 and 20111210121000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4441564 + ... + 7742732.

It is an arithmetic number, because the mean of its divisors is an integer number (1020180372120).

Almost surely, 2^{20111210121012} is an apocalyptic number.

It is an amenable number.

20111210121012 is an abundant number, since it is smaller than the sum of its proper divisors (28857447740748).

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

20111210121012 is a wasteful number, since it uses less digits than its factorization.

20111210121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323272 (or 3323270 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20111210121012 its reverse (21012101211102), we get a palindrome (41123311332114).

The spelling of 20111210121012 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, twelve".