142355231520021 has 32 divisors (see below), whose sum is σ = 227609996741120. Its totient is φ = 87414011479872.

The previous prime is 142355231519999. The next prime is 142355231520031. The reversal of 142355231520021 is 120025132553241.

142355231520021 is a `hidden beast` number, since 1 + 4 + 2 + 3 + 552 + 31 + 52 + 0 + 0 + 21 = 666.

It is not a de Polignac number, because 142355231520021 - 2¹¹ = 142355231517973 is a prime.

It is a super-2 number, since 2×142355231520021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142355231520031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437818546 + ... + 438143571.

It is an arithmetic number, because the mean of its divisors is an integer number (7112812398160).

Almost surely, 2^{142355231520021} is an apocalyptic number.

It is an amenable number.

142355231520021 is a deficient number, since it is larger than the sum of its proper divisors (85254765221099).

142355231520021 is a wasteful number, since it uses less digits than its factorization.

142355231520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875962602 (or 875962596 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 142355231520021 in words is "one hundred forty-two trillion, three hundred fifty-five billion, two hundred thirty-one million, five hundred twenty thousand, twenty-one".