1021111012012 has 24 divisors (see below), whose sum is σ = 2199316026656. Its totient is φ = 403956004608.

The previous prime is 1021111011989. The next prime is 1021111012013. The reversal of 1021111012012 is 2102101111201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1021111011983 and 1021111012001.

It is not an unprimeable number, because it can be changed into a prime (1021111012013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402624653 + ... + 1402625380.

Almost surely, 2^{1021111012012} is an apocalyptic number.

It is an amenable number.

1021111012012 is an abundant number, since it is smaller than the sum of its proper divisors (1178205014644).

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

1021111012012 is a wasteful number, since it uses less digits than its factorization.

1021111012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805250057 (or 2805250055 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021111012012 its reverse (2102101111201), we get a palindrome (3123212123213).

The spelling of 1021111012012 in words is "one trillion, twenty-one billion, one hundred eleven million, twelve thousand, twelve".