212143400142021 has 40 divisors (see below), whose sum is σ = 322890208701984. Its totient is φ = 138758191659360.

The previous prime is 212143400141989. The next prime is 212143400142049. The reversal of 212143400142021 is 120241004341212.

212143400142021 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 43 + 400 + 14 + 202 + 1 = 666.

It is not a de Polignac number, because 212143400142021 - 2⁵ = 212143400141989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212143400142221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 285418150 + ... + 286160456.

Almost surely, 2^{212143400142021} is an apocalyptic number.

It is an amenable number.

212143400142021 is a deficient number, since it is larger than the sum of its proper divisors (110746808559963).

212143400142021 is an equidigital number, since it uses as much as digits as its factorization.

212143400142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808943 (or 808934 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 212143400142021 its reverse (120241004341212), we get a palindrome (332384404483233).

The spelling of 212143400142021 in words is "two hundred twelve trillion, one hundred forty-three billion, four hundred million, one hundred forty-two thousand, twenty-one".