121243100 has 36 divisors (see below), whose sum is σ = 287018088. Its totient is φ = 44088000.

The previous prime is 121243069. The next prime is 121243103. The reversal of 121243100 is 1342121.

It is a super-2 number, since 2×121243100² = 29399778595220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54011 + ... + 56210.

Almost surely, 2^121243100 is an apocalyptic number.

121243100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121243100 is an abundant number, since it is smaller than the sum of its proper divisors (165774988).

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

121243100 is a wasteful number, since it uses less digits than its factorization.

121243100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110246 (or 110239 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121243100 is about 11011.0444554547. The cubic root of 121243100 is about 494.9397607203.

Adding to 121243100 its reverse (1342121), we get a palindrome (122585221).

The spelling of 121243100 in words is "one hundred twenty-one million, two hundred forty-three thousand, one hundred".