121332220100 has 72 divisors (see below), whose sum is σ = 324050384448. Its totient is φ = 38399644800.

The previous prime is 121332220039. The next prime is 121332220109. The reversal of 121332220100 is 1022233121.

It is not an unprimeable number, because it can be changed into a prime (121332220109) 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, 6657506 + ... + 6675705.

It is an arithmetic number, because the mean of its divisors is an integer number (4500699784).

Almost surely, 2^121332220100 is an apocalyptic number.

121332220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121332220100 is an abundant number, since it is smaller than the sum of its proper divisors (202718164348).

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

121332220100 is a wasteful number, since it uses less digits than its factorization.

121332220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333245 (or 13333238 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 121332220100 its reverse (1022233121), we get a palindrome (122354453221).

The spelling of 121332220100 in words is "one hundred twenty-one billion, three hundred thirty-two million, two hundred twenty thousand, one hundred".