121045400 has 48 divisors (see below), whose sum is σ = 321638640. Its totient is φ = 41500800.

The previous prime is 121045381. The next prime is 121045417. The reversal of 121045400 is 4540121.

It is a super-2 number, since 2×121045400² = 29303977722320000, which 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 11 ways as a sum of consecutive naturals, for example, 41831 + ... + 44630.

It is an arithmetic number, because the mean of its divisors is an integer number (6700805).

Almost surely, 2^121045400 is an apocalyptic number.

121045400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121045400 is an abundant number, since it is smaller than the sum of its proper divisors (200593240).

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

121045400 is a wasteful number, since it uses less digits than its factorization.

121045400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86484 (or 86475 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 121045400 is about 11002.0634428274. The cubic root of 121045400 is about 494.6705967467.

Adding to 121045400 its reverse (4540121), we get a palindrome (125585521).

The spelling of 121045400 in words is "one hundred twenty-one million, forty-five thousand, four hundred".