221412500236709 has 2 divisors, whose sum is σ = 221412500236710. Its totient is φ = 221412500236708.

The previous prime is 221412500236667. The next prime is 221412500236727. The reversal of 221412500236709 is 907632005214122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201082411204609 + 20330089032100 = 14180353^2 + 4508890^2 .

It is a cyclic number.

It is not a de Polignac number, because 221412500236709 - 2²⁸ = 221412231801253 is a prime.

It is a super-2 number, since 2×221412500236709² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221412500236709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221412560236709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110706250118354 + 110706250118355.

It is an arithmetic number, because the mean of its divisors is an integer number (110706250118355).

Almost surely, 2^{221412500236709} is an apocalyptic number.

It is an amenable number.

221412500236709 is a deficient number, since it is larger than the sum of its proper divisors (1).

221412500236709 is an equidigital number, since it uses as much as digits as its factorization.

221412500236709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 221412500236709 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred million, two hundred thirty-six thousand, seven hundred nine".