3121220057 has 2 divisors, whose sum is σ = 3121220058. Its totient is φ = 3121220056.

The previous prime is 3121220029. The next prime is 3121220087. The reversal of 3121220057 is 7500221213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3102044416 + 19175641 = 55696^2 + 4379^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121220057 - 2¹² = 3121215961 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121220087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560610028 + 1560610029.

It is an arithmetic number, because the mean of its divisors is an integer number (1560610029).

Almost surely, 2^3121220057 is an apocalyptic number.

It is an amenable number.

3121220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121220057 is an equidigital number, since it uses as much as digits as its factorization.

3121220057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 3121220057 is about 55867.8803696722. The cubic root of 3121220057 is about 1461.4191581876.

The spelling of 3121220057 in words is "three billion, one hundred twenty-one million, two hundred twenty thousand, fifty-seven".