221331134323402 has 16 divisors (see below), whose sum is σ = 333326102889024. Its totient is φ = 110222451100000.

The previous prime is 221331134323379. The next prime is 221331134323447. The reversal of 221331134323402 is 204323431133122.

221331134323402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20685702 + ... + 29505262.

It is an arithmetic number, because the mean of its divisors is an integer number (20832881430564).

Almost surely, 2^{221331134323402} is an apocalyptic number.

221331134323402 is a deficient number, since it is larger than the sum of its proper divisors (111994968565622).

221331134323402 is a wasteful number, since it uses less digits than its factorization.

221331134323402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8869805.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 221331134323402 its reverse (204323431133122), we get a palindrome (425654565456524).

The spelling of 221331134323402 in words is "two hundred twenty-one trillion, three hundred thirty-one billion, one hundred thirty-four million, three hundred twenty-three thousand, four hundred two".