221100101120957 has 2 divisors, whose sum is σ = 221100101120958. Its totient is φ = 221100101120956.

The previous prime is 221100101120953. The next prime is 221100101121007. The reversal of 221100101120957 is 759021101001122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179092216261156 + 42007884859801 = 13382534^2 + 6481349^2 .

It is a cyclic number.

It is not a de Polignac number, because 221100101120957 - 2² = 221100101120953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221100101120953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550050560478 + 110550050560479.

It is an arithmetic number, because the mean of its divisors is an integer number (110550050560479).

Almost surely, 2^{221100101120957} is an apocalyptic number.

It is an amenable number.

221100101120957 is a deficient number, since it is larger than the sum of its proper divisors (1).

221100101120957 is an equidigital number, since it uses as much as digits as its factorization.

221100101120957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 32.

The spelling of 221100101120957 in words is "two hundred twenty-one trillion, one hundred billion, one hundred one million, one hundred twenty thousand, nine hundred fifty-seven".