31023210122020 has 24 divisors (see below), whose sum is σ = 68981020154424. Its totient is φ = 11679326163456.

The previous prime is 31023210122011. The next prime is 31023210122029. The reversal of 31023210122020 is 2022101232013.

It is an interprime number because it is at equal distance from previous prime (31023210122011) and next prime (31023210122029).

It can be written as a sum of positive squares in 4 ways, for example, as 3794454660096 + 27228755461924 = 1947936^2 + 5218118^2 .

It is not an unprimeable number, because it can be changed into a prime (31023210122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45622367487 + ... + 45622368166.

It is an arithmetic number, because the mean of its divisors is an integer number (2874209173101).

Almost surely, 2^{31023210122020} is an apocalyptic number.

It is an amenable number.

31023210122020 is an abundant number, since it is smaller than the sum of its proper divisors (37957810032404).

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

31023210122020 is a wasteful number, since it uses less digits than its factorization.

31023210122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91244735679 (or 91244735677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31023210122020 its reverse (2022101232013), we get a palindrome (33045311354033).

The spelling of 31023210122020 in words is "thirty-one trillion, twenty-three billion, two hundred ten million, one hundred twenty-two thousand, twenty".