121200110 has 16 divisors (see below), whose sum is σ = 227645856. Its totient is φ = 46372128.

The previous prime is 121200109. The next prime is 121200139. The reversal of 121200110 is 11002121.

It is a congruent number.

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, 263249 + ... + 263708.

It is an arithmetic number, because the mean of its divisors is an integer number (14227866).

Almost surely, 2^121200110 is an apocalyptic number.

121200110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121200110 is a deficient number, since it is larger than the sum of its proper divisors (106445746).

121200110 is a wasteful number, since it uses less digits than its factorization.

121200110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526987.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121200110 is about 11009.0921514901. The cubic root of 121200110 is about 494.8812557397.

Adding to 121200110 its reverse (11002121), we get a palindrome (132202231).

The spelling of 121200110 in words is "one hundred twenty-one million, two hundred thousand, one hundred ten".