221112102021997 has 2 divisors, whose sum is σ = 221112102021998. Its totient is φ = 221112102021996.

The previous prime is 221112102021949. The next prime is 221112102022039. The reversal of 221112102021997 is 799120201211122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168830366588676 + 52281735433321 = 12993474^2 + 7230611^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112102021997 - 2³⁹ = 220562346208109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221112102001997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556051010998 + 110556051010999.

It is an arithmetic number, because the mean of its divisors is an integer number (110556051010999).

Almost surely, 2^{221112102021997} is an apocalyptic number.

It is an amenable number.

221112102021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112102021997 is an equidigital number, since it uses as much as digits as its factorization.

221112102021997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 221112102021997 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred two million, twenty-one thousand, nine hundred ninety-seven".