121100120210020 has 24 divisors (see below), whose sum is σ = 290640288504384. Its totient is φ = 41520041214816.

The previous prime is 121100120209987. The next prime is 121100120210033. The reversal of 121100120210020 is 20012021001121.

It is a super-2 number, since 2×121100120210020² (a number of 29 digits) contains 22 as substring.

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, 432500429182 + ... + 432500429461.

It is an arithmetic number, because the mean of its divisors is an integer number (12110012021016).

Almost surely, 2^{121100120210020} is an apocalyptic number.

121100120210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100120210020 is an abundant number, since it is smaller than the sum of its proper divisors (169540168294364).

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

121100120210020 is a wasteful number, since it uses less digits than its factorization.

121100120210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865000858659 (or 865000858657 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121100120210020 its reverse (20012021001121), we get a palindrome (141112141211141).

The spelling of 121100120210020 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twenty million, two hundred ten thousand, twenty".