31020123300121 has 2 divisors, whose sum is σ = 31020123300122. Its totient is φ = 31020123300120.

The previous prime is 31020123300107. The next prime is 31020123300139. The reversal of 31020123300121 is 12100332102013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29561632317721 + 1458490982400 = 5437061^2 + 1207680^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020123300121 - 2³¹ = 31017975816473 is a prime.

It is a super-2 number, since 2×31020123300121² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31020123700121) 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 as a sum of consecutive naturals, namely, 15510061650060 + 15510061650061.

It is an arithmetic number, because the mean of its divisors is an integer number (15510061650061).

Almost surely, 2^{31020123300121} is an apocalyptic number.

It is an amenable number.

31020123300121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020123300121 is an equidigital number, since it uses as much as digits as its factorization.

31020123300121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 31020123300121 its reverse (12100332102013), we get a palindrome (43120455402134).

The spelling of 31020123300121 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, three hundred thousand, one hundred twenty-one".