31020123221077 has 2 divisors, whose sum is σ = 31020123221078. Its totient is φ = 31020123221076.

The previous prime is 31020123220987. The next prime is 31020123221107. The reversal of 31020123221077 is 77012232102013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30921451218436 + 98672002641 = 5560706^2 + 314121^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020123221077 - 2²⁷ = 31019989003349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020123221677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510061610538 + 15510061610539.

It is an arithmetic number, because the mean of its divisors is an integer number (15510061610539).

Almost surely, 2^{31020123221077} is an apocalyptic number.

It is an amenable number.

31020123221077 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020123221077 is an equidigital number, since it uses as much as digits as its factorization.

31020123221077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The spelling of 31020123221077 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, two hundred twenty-one thousand, seventy-seven".