220122100100 has 72 divisors (see below), whose sum is σ = 546539810880. Its totient is φ = 75382369920.

The previous prime is 220122100073. The next prime is 220122100103. The reversal of 220122100100 is 1001221022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (220122100103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418262 + ... + 784338.

Almost surely, 2^220122100100 is an apocalyptic number.

220122100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220122100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273269905440).

220122100100 is an abundant number, since it is smaller than the sum of its proper divisors (326417710780).

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

220122100100 is a wasteful number, since it uses less digits than its factorization.

220122100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366957 (or 366950 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220122100100 its reverse (1001221022), we get a palindrome (221123321122).

The spelling of 220122100100 in words is "two hundred twenty billion, one hundred twenty-two million, one hundred thousand, one hundred".