12121023100 has 18 divisors (see below), whose sum is σ = 26302620344. Its totient is φ = 4848409200.

The previous prime is 12121023091. The next prime is 12121023113. The reversal of 12121023100 is 132012121.

It is a super-2 number, since 2×12121023100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60605016 + ... + 60605215.

Almost surely, 2^12121023100 is an apocalyptic number.

12121023100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121023100 is an abundant number, since it is smaller than the sum of its proper divisors (14181597244).

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

12121023100 is a wasteful number, since it uses less digits than its factorization.

12121023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121210245 (or 121210238 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12121023100 its reverse (132012121), we get a palindrome (12253035221).

The spelling of 12121023100 in words is "twelve billion, one hundred twenty-one million, twenty-three thousand, one hundred".