121100211110020 has 24 divisors (see below), whose sum is σ = 267695203507200. Its totient is φ = 45890606315232.

The previous prime is 121100211109981. The next prime is 121100211110063. The reversal of 121100211110020 is 20011112001121.

It is a happy number.

It is a super-2 number, since 2×121100211110020² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159342382660 + ... + 159342383419.

It is an arithmetic number, because the mean of its divisors is an integer number (11153966812800).

Almost surely, 2^{121100211110020} is an apocalyptic number.

121100211110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100211110020 is an abundant number, since it is smaller than the sum of its proper divisors (146594992397180).

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

121100211110020 is a wasteful number, since it uses less digits than its factorization.

121100211110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318684766107 (or 318684766105 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121100211110020 its reverse (20011112001121), we get a palindrome (141111323111141).

The spelling of 121100211110020 in words is "one hundred twenty-one trillion, one hundred billion, two hundred eleven million, one hundred ten thousand, twenty".