1020013123212 has 72 divisors (see below), whose sum is σ = 2602837036800. Its totient is φ = 336788648928.

The previous prime is 1020013123211. The next prime is 1020013123229. The reversal of 1020013123212 is 2123213100201.

1020013123212 is a `hidden beast` number, since 10 + 20 + 0 + 1 + 312 + 321 + 2 = 666.

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 (1020013123211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1964593 + ... + 2428919.

It is an arithmetic number, because the mean of its divisors is an integer number (36150514400).

Almost surely, 2^{1020013123212} is an apocalyptic number.

1020013123212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020013123212 is an abundant number, since it is smaller than the sum of its proper divisors (1582823913588).

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

1020013123212 is a wasteful number, since it uses less digits than its factorization.

1020013123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464915 (or 464910 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1020013123212 its reverse (2123213100201), we get a palindrome (3143226223413).

The spelling of 1020013123212 in words is "one trillion, twenty billion, thirteen million, one hundred twenty-three thousand, two hundred twelve".