121011110020 has 24 divisors (see below), whose sum is σ = 254365167168. Its totient is φ = 48358380000.

The previous prime is 121011109987. The next prime is 121011110039. The reversal of 121011110020 is 20011110121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121011109979 and 121011110006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2857456 + ... + 2899495.

It is an arithmetic number, because the mean of its divisors is an integer number (10598548632).

Almost surely, 2^121011110020 is an apocalyptic number.

121011110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011110020 is an abundant number, since it is smaller than the sum of its proper divisors (133354057148).

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

121011110020 is a wasteful number, since it uses less digits than its factorization.

121011110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5758011 (or 5758009 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121011110020 its reverse (20011110121), we get a palindrome (141022220141).

The spelling of 121011110020 in words is "one hundred twenty-one billion, eleven million, one hundred ten thousand, twenty".