121120210100020 has 48 divisors (see below), whose sum is σ = 254455500656448. Its totient is φ = 48428457707520.

The previous prime is 121120210099979. The next prime is 121120210100053. The reversal of 121120210100020 is 20001012021121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499609435 + ... + 499851805.

It is an arithmetic number, because the mean of its divisors is an integer number (5301156263676).

Almost surely, 2^{121120210100020} is an apocalyptic number.

121120210100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120210100020 is an abundant number, since it is smaller than the sum of its proper divisors (133335290556428).

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

121120210100020 is a wasteful number, since it uses less digits than its factorization.

121120210100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252400 (or 252398 counting only the distinct ones).

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

Adding to 121120210100020 its reverse (20001012021121), we get a palindrome (141121222121141).

The spelling of 121120210100020 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred thousand, twenty".