31201321427 has 2 divisors, whose sum is σ = 31201321428. Its totient is φ = 31201321426.

The previous prime is 31201321423. The next prime is 31201321451. The reversal of 31201321427 is 72412310213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31201321427 - 2² = 31201321423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31201321396 and 31201321405.

It is not a weakly prime, because it can be changed into another prime (31201321421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600660713 + 15600660714.

It is an arithmetic number, because the mean of its divisors is an integer number (15600660714).

Almost surely, 2^31201321427 is an apocalyptic number.

31201321427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201321427 is an equidigital number, since it uses as much as digits as its factorization.

31201321427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 31201321427 in words is "thirty-one billion, two hundred one million, three hundred twenty-one thousand, four hundred twenty-seven".