121100420 has 24 divisors (see below), whose sum is σ = 290641344. Its totient is φ = 41520096.

The previous prime is 121100411. The next prime is 121100437. The reversal of 121100420 is 24001121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432362 + ... + 432641.

It is an arithmetic number, because the mean of its divisors is an integer number (12110056).

Almost surely, 2^121100420 is an apocalyptic number.

121100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100420 is an abundant number, since it is smaller than the sum of its proper divisors (169540924).

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

121100420 is a wasteful number, since it uses less digits than its factorization.

121100420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865019 (or 865017 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 121100420 is about 11004.5635987985. The cubic root of 121100420 is about 494.7455346173.

Adding to 121100420 its reverse (24001121), we get a palindrome (145101541).

The spelling of 121100420 in words is "one hundred twenty-one million, one hundred thousand, four hundred twenty".