122012221100 has 144 divisors (see below), whose sum is σ = 340747524096. Its totient is φ = 36802944000.

The previous prime is 122012221091. The next prime is 122012221127. The reversal of 122012221100 is 1122210221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16877 + ... + 494276.

Almost surely, 2^122012221100 is an apocalyptic number.

122012221100 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 122012221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170373762048).

122012221100 is an abundant number, since it is smaller than the sum of its proper divisors (218735302996).

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

122012221100 is a wasteful number, since it uses less digits than its factorization.

122012221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511216 (or 511209 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 122012221100 its reverse (1122210221), we get a palindrome (123134431321).

The spelling of 122012221100 in words is "one hundred twenty-two billion, twelve million, two hundred twenty-one thousand, one hundred".