121330100 has 18 divisors (see below), whose sum is σ = 263286534. Its totient is φ = 48532000.

The previous prime is 121330093. The next prime is 121330103. The reversal of 121330100 is 1033121.

It can be written as a sum of positive squares in 3 ways, for example, as 21904 + 121308196 = 148^2 + 11014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121330103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 606551 + ... + 606750.

Almost surely, 2^121330100 is an apocalyptic number.

121330100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121330100 is an abundant number, since it is smaller than the sum of its proper divisors (141956434).

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

121330100 is a wasteful number, since it uses less digits than its factorization.

121330100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213315 (or 1213308 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 121330100 is about 11014.9943259177. The cubic root of 121330100 is about 495.0581164972.

Adding to 121330100 its reverse (1033121), we get a palindrome (122363221).

It can be divided in two parts, 1213 and 30100, that added together give a palindrome (31313).

The spelling of 121330100 in words is "one hundred twenty-one million, three hundred thirty thousand, one hundred".