221422122401652 has 72 divisors (see below), whose sum is σ = 573797318028480. Its totient is φ = 71951931031680.

The previous prime is 221422122401609. The next prime is 221422122401659. The reversal of 221422122401652 is 256104221224122.

221422122401652 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 221 + 22 + 401 + 6 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422122401659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55642002 + ... + 59488457.

It is an arithmetic number, because the mean of its divisors is an integer number (7969407194840).

Almost surely, 2^{221422122401652} is an apocalyptic number.

It is an amenable number.

221422122401652 is an abundant number, since it is smaller than the sum of its proper divisors (352375195626828).

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

221422122401652 is a wasteful number, since it uses less digits than its factorization.

221422122401652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115131813 (or 115131808 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

Adding to 221422122401652 its reverse (256104221224122), we get a palindrome (477526343625774).

The spelling of 221422122401652 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, one hundred twenty-two million, four hundred one thousand, six hundred fifty-two".