210143431221021 has 32 divisors (see below), whose sum is σ = 312289941580800. Its totient is φ = 139660946774640.

The previous prime is 210143431221011. The next prime is 210143431221043. The reversal of 210143431221021 is 120122134341012.

210143431221021 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 4 + 3 + 431 + 221 + 0 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-210143431221021 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210143431221011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39856806 + ... + 44820216.

It is an arithmetic number, because the mean of its divisors is an integer number (9759060674400).

Almost surely, 2^{210143431221021} is an apocalyptic number.

It is an amenable number.

210143431221021 is a deficient number, since it is larger than the sum of its proper divisors (102146510359779).

210143431221021 is a wasteful number, since it uses less digits than its factorization.

210143431221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4968286 (or 4968280 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 210143431221021 its reverse (120122134341012), we get a palindrome (330265565562033).

The spelling of 210143431221021 in words is "two hundred ten trillion, one hundred forty-three billion, four hundred thirty-one million, two hundred twenty-one thousand, twenty-one".