121102102120020 has 96 divisors (see below), whose sum is σ = 388606188902400. Its totient is φ = 27603376047744.

The previous prime is 121102102120009. The next prime is 121102102120057. The reversal of 121102102120020 is 20021201201121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401434650 + ... + 401736209.

It is an arithmetic number, because the mean of its divisors is an integer number (4047981134400).

Almost surely, 2^{121102102120020} is an apocalyptic number.

121102102120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102102120020 is an abundant number, since it is smaller than the sum of its proper divisors (267504086782380).

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

121102102120020 is a wasteful number, since it uses less digits than its factorization.

121102102120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803171237 (or 803171235 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121102102120020 its reverse (20021201201121), we get a palindrome (141123303321141).

The spelling of 121102102120020 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred two million, one hundred twenty thousand, twenty".