1912200991512 has 256 divisors, whose sum is σ = 6194611814400. Its totient is φ = 479113367040.

The previous prime is 1912200991499. The next prime is 1912200991517. The reversal of 1912200991512 is 2151990022191.

It is a super-2 number, since 2×1912200991512² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912200991517) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1855798 + ... + 2695994.

It is an arithmetic number, because the mean of its divisors is an integer number (24197702400).

Almost surely, 2^{1912200991512} is an apocalyptic number.

1912200991512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1912200991512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3097305907200).

1912200991512 is an abundant number, since it is smaller than the sum of its proper divisors (4282410822888).

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

1912200991512 is a wasteful number, since it uses less digits than its factorization.

1912200991512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840286 (or 840282 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 42.

The spelling of 1912200991512 in words is "one trillion, nine hundred twelve billion, two hundred million, nine hundred ninety-one thousand, five hundred twelve".