121210110020 has 24 divisors (see below), whose sum is σ = 256372468800. Its totient is φ = 48135236832.

The previous prime is 121210110013. The next prime is 121210110023. The reversal of 121210110020 is 20011012121.

It is a junction number, because it is equal to n+sod(n) for n = 121210109983 and 121210110010.

It is not an unprimeable number, because it can be changed into a prime (121210110023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21797600 + ... + 21803159.

It is an arithmetic number, because the mean of its divisors is an integer number (10682186200).

Almost surely, 2^121210110020 is an apocalyptic number.

121210110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210110020 is an abundant number, since it is smaller than the sum of its proper divisors (135162358780).

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

121210110020 is a wasteful number, since it uses less digits than its factorization.

121210110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43600907 (or 43600905 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121210110020 its reverse (20011012121), we get a palindrome (141221122141).

The spelling of 121210110020 in words is "one hundred twenty-one billion, two hundred ten million, one hundred ten thousand, twenty".