221000021122 has 16 divisors (see below), whose sum is σ = 334282810752. Its totient is φ = 109573691760.

The previous prime is 221000021111. The next prime is 221000021129. The reversal of 221000021122 is 221120000122.

It is a happy number.

It is a super-2 number, since 2×221000021122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221000021129) 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, 29848 + ... + 665500.

It is an arithmetic number, because the mean of its divisors is an integer number (20892675672).

Almost surely, 2^221000021122 is an apocalyptic number.

221000021122 is a deficient number, since it is larger than the sum of its proper divisors (113282789630).

221000021122 is a wasteful number, since it uses less digits than its factorization.

221000021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637113.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221000021122 its reverse (221120000122), we get a palindrome (442120021244).

The spelling of 221000021122 in words is "two hundred twenty-one billion, twenty-one thousand, one hundred twenty-two".