1021311132012 has 18 divisors (see below), whose sum is σ = 2581647583788. Its totient is φ = 340437043992.

The previous prime is 1021311132011. The next prime is 1021311132019. The reversal of 1021311132012 is 2102311131201.

1021311132012 is a `hidden beast` number, since 1 + 0 + 21 + 311 + 1 + 320 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1021311132011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14184876798 + ... + 14184876869.

It is an arithmetic number, because the mean of its divisors is an integer number (143424865766).

Almost surely, 2^{1021311132012} is an apocalyptic number.

1021311132012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021311132012 is an abundant number, since it is smaller than the sum of its proper divisors (1560336451776).

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

1021311132012 is a wasteful number, since it uses less digits than its factorization.

1021311132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28369753677 (or 28369753672 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1021311132012 its reverse (2102311131201), we get a palindrome (3123622263213).

The spelling of 1021311132012 in words is "one trillion, twenty-one billion, three hundred eleven million, one hundred thirty-two thousand, twelve".