142221681720 has 48 divisors (see below), whose sum is σ = 462220466760. Its totient is φ = 37925781696.

The previous prime is 142221681713. The next prime is 142221681737. The reversal of 142221681720 is 27186122241.

142221681720 is a `hidden beast` number, since 1 + 422 + 2 + 1 + 68 + 172 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197529754 + ... + 197530473.

Almost surely, 2^142221681720 is an apocalyptic number.

142221681720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142221681720 is an abundant number, since it is smaller than the sum of its proper divisors (319998785040).

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

142221681720 is a wasteful number, since it uses less digits than its factorization.

142221681720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395060244 (or 395060237 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 142221681720 in words is "one hundred forty-two billion, two hundred twenty-one million, six hundred eighty-one thousand, seven hundred twenty".