221281953251074 has 16 divisors (see below), whose sum is σ = 334070668323000. Its totient is φ = 109925205496704.

The previous prime is 221281953251003. The next prime is 221281953251131. The reversal of 221281953251074 is 470152359182122.

It can be written as a sum of positive squares in 4 ways, for example, as 101839240120849 + 119442713130225 = 10091543^2 + 10928985^2 .

It is a super-2 number, since 2×221281953251074² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32292619 + ... + 38540590.

Almost surely, 2^{221281953251074} is an apocalyptic number.

221281953251074 is a deficient number, since it is larger than the sum of its proper divisors (112788715071926).

221281953251074 is a wasteful number, since it uses less digits than its factorization.

221281953251074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70843317.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 221281953251074 in words is "two hundred twenty-one trillion, two hundred eighty-one billion, nine hundred fifty-three million, two hundred fifty-one thousand, seventy-four".