101221019057 has 2 divisors, whose sum is σ = 101221019058. Its totient is φ = 101221019056.

The previous prime is 101221019051. The next prime is 101221019089. The reversal of 101221019057 is 750910122101.

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., 67792016161 + 33429002896 = 260369^2 + 182836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221019057 is a prime.

It is not a weakly prime, because it can be changed into another prime (101221019051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610509528 + 50610509529.

It is an arithmetic number, because the mean of its divisors is an integer number (50610509529).

Almost surely, 2^101221019057 is an apocalyptic number.

It is an amenable number.

101221019057 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221019057 is an equidigital number, since it uses as much as digits as its factorization.

101221019057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 29.

The spelling of 101221019057 in words is "one hundred one billion, two hundred twenty-one million, nineteen thousand, fifty-seven".