101211220057 has 2 divisors, whose sum is σ = 101211220058. Its totient is φ = 101211220056.

The previous prime is 101211220051. The next prime is 101211220073. The reversal of 101211220057 is 750022112101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59831116816 + 41380103241 = 244604^2 + 203421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101211220057 is a prime.

It is a super-2 number, since 2×101211220057² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101211220051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605610028 + 50605610029.

It is an arithmetic number, because the mean of its divisors is an integer number (50605610029).

Almost surely, 2^101211220057 is an apocalyptic number.

It is an amenable number.

101211220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211220057 is an equidigital number, since it uses as much as digits as its factorization.

101211220057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 101211220057 its reverse (750022112101), we get a palindrome (851233332158).

The spelling of 101211220057 in words is "one hundred one billion, two hundred eleven million, two hundred twenty thousand, fifty-seven".