122122022100 has 144 divisors (see below), whose sum is σ = 384215325312. Its totient is φ = 29768855040.

The previous prime is 122122022089. The next prime is 122122022101. The reversal of 122122022100 is 1220221221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 122122022100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122022101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 249694 + ... + 553706.

Almost surely, 2^122122022100 is an apocalyptic number.

122122022100 is a gapful number since it is divisible by the number (10) 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 122122022100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192107662656).

122122022100 is an abundant number, since it is smaller than the sum of its proper divisors (262093303212).

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

122122022100 is a wasteful number, since it uses less digits than its factorization.

122122022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304146 (or 304139 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 122122022100 its reverse (1220221221), we get a palindrome (123342243321).

The spelling of 122122022100 in words is "one hundred twenty-two billion, one hundred twenty-two million, twenty-two thousand, one hundred".