210131211020431 has 4 divisors (see below), whose sum is σ = 210176332607872. Its totient is φ = 210086089432992.

The previous prime is 210131211020389. The next prime is 210131211020513. The reversal of 210131211020431 is 134020112131012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210131211020431 - 2¹¹ = 210131211018383 is a prime.

It is a super-2 number, since 2×210131211020431² (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 (210131211027431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22560786735 + ... + 22560796048.

It is an arithmetic number, because the mean of its divisors is an integer number (52544083151968).

Almost surely, 2^{210131211020431} is an apocalyptic number.

210131211020431 is a deficient number, since it is larger than the sum of its proper divisors (45121587441).

210131211020431 is an equidigital number, since it uses as much as digits as its factorization.

210131211020431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45121587440.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 210131211020431 its reverse (134020112131012), we get a palindrome (344151323151443).

The spelling of 210131211020431 in words is "two hundred ten trillion, one hundred thirty-one billion, two hundred eleven million, twenty thousand, four hundred thirty-one".