221422122401730 has 128 divisors (see below), whose sum is σ = 535578245434368. Its totient is φ = 58584980942592.

The previous prime is 221422122401659. The next prime is 221422122401803. The reversal of 221422122401730 is 37104221224122.

It is a junction number, because it is equal to n+sod(n) for n = 221422122401691 and 221422122401700.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9936807169 + ... + 9936829451.

It is an arithmetic number, because the mean of its divisors is an integer number (4184205042456).

Almost surely, 2^{221422122401730} is an apocalyptic number.

221422122401730 is an abundant number, since it is smaller than the sum of its proper divisors (314156123032638).

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

221422122401730 is a wasteful number, since it uses less digits than its factorization.

221422122401730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27440.

The product of its (nonzero) digits is 21504, while the sum is 33.

Adding to 221422122401730 its reverse (37104221224122), we get a palindrome (258526343625852).

The spelling of 221422122401730 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, one hundred twenty-two million, four hundred one thousand, seven hundred thirty".