31023312120100 has 36 divisors (see below), whose sum is σ = 68590787072724. Its totient is φ = 12175186641280.

The previous prime is 31023312120089. The next prime is 31023312120139. The reversal of 31023312120100 is 102121332013.

It can be written as a sum of positive squares in 6 ways, for example, as 3297885056064 + 27725427064036 = 1816008^2 + 5265494^2 .

It is a super-2 number, since 2×31023312120100² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2926722259 + ... + 2926732858.

It is an arithmetic number, because the mean of its divisors is an integer number (1905299640909).

Almost surely, 2^{31023312120100} is an apocalyptic number.

It is an amenable number.

31023312120100 is an abundant number, since it is smaller than the sum of its proper divisors (37567474952624).

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

31023312120100 is a wasteful number, since it uses less digits than its factorization.

31023312120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853455184 (or 5853455177 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31023312120100 its reverse (102121332013), we get a palindrome (31125433452113).

The spelling of 31023312120100 in words is "thirty-one trillion, twenty-three billion, three hundred twelve million, one hundred twenty thousand, one hundred".