121200020110 has 32 divisors (see below), whose sum is σ = 237097032480. Its totient is φ = 44340213888.

The previous prime is 121200020069. The next prime is 121200020141. The reversal of 121200020110 is 11020002121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4262472 + ... + 4290811.

It is an arithmetic number, because the mean of its divisors is an integer number (7409282265).

Almost surely, 2^121200020110 is an apocalyptic number.

121200020110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121200020110 is a deficient number, since it is larger than the sum of its proper divisors (115897012370).

121200020110 is a wasteful number, since it uses less digits than its factorization.

121200020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553412.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121200020110 its reverse (11020002121), we get a palindrome (132220022231).

The spelling of 121200020110 in words is "one hundred twenty-one billion, two hundred million, twenty thousand, one hundred ten".