31012200220987 has 2 divisors, whose sum is σ = 31012200220988. Its totient is φ = 31012200220986.

The previous prime is 31012200220949. The next prime is 31012200221021. The reversal of 31012200220987 is 78902200221013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31012200220987 - 2¹¹ = 31012200218939 is a prime.

It is a super-2 number, since 2×31012200220987² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31012200229987) 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, 15506100110493 + 15506100110494.

It is an arithmetic number, because the mean of its divisors is an integer number (15506100110494).

Almost surely, 2^{31012200220987} is an apocalyptic number.

31012200220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012200220987 is an equidigital number, since it uses as much as digits as its factorization.

31012200220987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 31012200220987 in words is "thirty-one trillion, twelve billion, two hundred million, two hundred twenty thousand, nine hundred eighty-seven".