221421251423633 has 8 divisors (see below), whose sum is σ = 225629573293056. Its totient is φ = 217244690474400.

The previous prime is 221421251423629. The next prime is 221421251423663. The reversal of 221421251423633 is 336324152124122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221421251423633 - 2² = 221421251423629 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221421251423663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7940215973 + ... + 7940243858.

It is an arithmetic number, because the mean of its divisors is an integer number (28203696661632).

Almost surely, 2^{221421251423633} is an apocalyptic number.

It is an amenable number.

221421251423633 is a deficient number, since it is larger than the sum of its proper divisors (4208321869423).

221421251423633 is a wasteful number, since it uses less digits than its factorization.

221421251423633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15880460095.

The product of its digits is 414720, while the sum is 41.

The spelling of 221421251423633 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-one million, four hundred twenty-three thousand, six hundred thirty-three".