221412504100251 has 16 divisors (see below), whose sum is σ = 295317878390784. Its totient is φ = 147557738070624.

The previous prime is 221412504100213. The next prime is 221412504100261. The reversal of 221412504100251 is 152001405214122.

It is not a de Polignac number, because 221412504100251 - 2⁶ = 221412504100187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221412504100211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174660966 + ... + 175924068.

It is an arithmetic number, because the mean of its divisors is an integer number (18457367399424).

Almost surely, 2^{221412504100251} is an apocalyptic number.

221412504100251 is a deficient number, since it is larger than the sum of its proper divisors (73905374290533).

221412504100251 is a wasteful number, since it uses less digits than its factorization.

221412504100251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283090.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 221412504100251 its reverse (152001405214122), we get a palindrome (373413909314373).

The spelling of 221412504100251 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred four million, one hundred thousand, two hundred fifty-one".