221401303129 has 2 divisors, whose sum is σ = 221401303130. Its totient is φ = 221401303128.

The previous prime is 221401303093. The next prime is 221401303153. The reversal of 221401303129 is 921303104122.

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., 140267477529 + 81133825600 = 374523^2 + 284840^2 .

It is a cyclic number.

It is not a de Polignac number, because 221401303129 - 2¹⁵ = 221401270361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221401303097 and 221401303106.

It is not a weakly prime, because it can be changed into another prime (221401303229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110700651564 + 110700651565.

It is an arithmetic number, because the mean of its divisors is an integer number (110700651565).

Almost surely, 2^221401303129 is an apocalyptic number.

It is an amenable number.

221401303129 is a deficient number, since it is larger than the sum of its proper divisors (1).

221401303129 is an equidigital number, since it uses as much as digits as its factorization.

221401303129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 221401303129 in words is "two hundred twenty-one billion, four hundred one million, three hundred three thousand, one hundred twenty-nine".