31020022303121 has 4 divisors (see below), whose sum is σ = 31020111550692. Its totient is φ = 31019933055552.

The previous prime is 31020022303037. The next prime is 31020022303177. The reversal of 31020022303121 is 12130322002013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29338591413121 + 1681430890000 = 5416511^2 + 1296700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31020022303121 is a prime.

It is a super-2 number, since 2×31020022303121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020022303093 and 31020022303102.

It is not an unprimeable number, because it can be changed into a prime (31020022300121) 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, 44100380 + ... + 44798253.

It is an arithmetic number, because the mean of its divisors is an integer number (7755027887673).

Almost surely, 2^{31020022303121} is an apocalyptic number.

It is an amenable number.

31020022303121 is a deficient number, since it is larger than the sum of its proper divisors (89247571).

31020022303121 is an equidigital number, since it uses as much as digits as its factorization.

31020022303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89247570.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31020022303121 its reverse (12130322002013), we get a palindrome (43150344305134).

The spelling of 31020022303121 in words is "thirty-one trillion, twenty billion, twenty-two million, three hundred three thousand, one hundred twenty-one".