221525103221376 has 128 divisors (see below), whose sum is σ = 603694955102400. Its totient is φ = 71947755307008.

The previous prime is 221525103221329. The next prime is 221525103221393. The reversal of 221525103221376 is 673122301525122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40704331 + ... + 45824586.

Almost surely, 2^{221525103221376} is an apocalyptic number.

It is an amenable number.

221525103221376 is an abundant number, since it is smaller than the sum of its proper divisors (382169851881024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221525103221376 is a wasteful number, since it uses less digits than its factorization.

221525103221376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86529106 (or 86529094 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

Adding to 221525103221376 its reverse (673122301525122), we get a palindrome (894647404746498).

The spelling of 221525103221376 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, one hundred three million, two hundred twenty-one thousand, three hundred seventy-six".