221411640711797 has 2 divisors, whose sum is σ = 221411640711798. Its totient is φ = 221411640711796.

The previous prime is 221411640711757. The next prime is 221411640711803. The reversal of 221411640711797 is 797117046114122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218303757311236 + 3107883400561 = 14775106^2 + 1762919^2 .

It is a cyclic number.

It is not a de Polignac number, because 221411640711797 - 2⁶ = 221411640711733 is a prime.

It is a super-2 number, since 2×221411640711797² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221411640711757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110705820355898 + 110705820355899.

It is an arithmetic number, because the mean of its divisors is an integer number (110705820355899).

Almost surely, 2^{221411640711797} is an apocalyptic number.

It is an amenable number.

221411640711797 is a deficient number, since it is larger than the sum of its proper divisors (1).

221411640711797 is an equidigital number, since it uses as much as digits as its factorization.

221411640711797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 53.

The spelling of 221411640711797 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty million, seven hundred eleven thousand, seven hundred ninety-seven".