12021871950 has 72 divisors (see below), whose sum is σ = 35235028296. Its totient is φ = 2914392000.

The previous prime is 12021871937. The next prime is 12021871991. The reversal of 12021871950 is 5917812021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1209381 + ... + 1219280.

It is an arithmetic number, because the mean of its divisors is an integer number (489375393).

Almost surely, 2^12021871950 is an apocalyptic number.

12021871950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021871950 is an abundant number, since it is smaller than the sum of its proper divisors (23213156346).

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

12021871950 is a wasteful number, since it uses less digits than its factorization.

12021871950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428690 (or 2428682 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 12021871950 in words is "twelve billion, twenty-one million, eight hundred seventy-one thousand, nine hundred fifty".