1212291250920 has 256 divisors, whose sum is σ = 4255330464000. Its totient is φ = 306142322688.

The previous prime is 1212291250903. The next prime is 1212291250943. The reversal of 1212291250920 is 290521922121.

1212291250920 is a `hidden beast` number, since 1 + 2 + 122 + 9 + 1 + 2 + 509 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59436244 + ... + 59456636.

It is an arithmetic number, because the mean of its divisors is an integer number (16622384625).

Almost surely, 2^{1212291250920} is an apocalyptic number.

1212291250920 is a gapful number since it is divisible by the number (10) 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 1212291250920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127665232000).

1212291250920 is an abundant number, since it is smaller than the sum of its proper divisors (3043039213080).

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

1212291250920 is a wasteful number, since it uses less digits than its factorization.

1212291250920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23329 (or 23319 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 1212291250920 in words is "one trillion, two hundred twelve billion, two hundred ninety-one million, two hundred fifty thousand, nine hundred twenty".