210131042020 has 12 divisors (see below), whose sum is σ = 441275188284. Its totient is φ = 84052416800.

The previous prime is 210131041999. The next prime is 210131042021. The reversal of 210131042020 is 20240131012.

It can be written as a sum of positive squares in 2 ways, for example, as 65626142976 + 144504899044 = 256176^2 + 380138^2 .

It is a super-2 number, since 2×210131042020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210131041985 and 210131042003.

It is not an unprimeable number, because it can be changed into a prime (210131042021) 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, 5253276031 + ... + 5253276070.

It is an arithmetic number, because the mean of its divisors is an integer number (36772932357).

Almost surely, 2^210131042020 is an apocalyptic number.

210131042020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210131042020 is an abundant number, since it is smaller than the sum of its proper divisors (231144146264).

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

210131042020 is a wasteful number, since it uses less digits than its factorization.

210131042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506552110 (or 10506552108 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210131042020 its reverse (20240131012), we get a palindrome (230371173032).

The spelling of 210131042020 in words is "two hundred ten billion, one hundred thirty-one million, forty-two thousand, twenty".