121000020210100 has 72 divisors (see below), whose sum is σ = 263895919455168. Its totient is φ = 48156176140800.

The previous prime is 121000020210049. The next prime is 121000020210109. The reversal of 121000020210100 is 1012020000121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000020210109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13455324 + ... + 20568076.

It is an arithmetic number, because the mean of its divisors is an integer number (3665221103544).

Almost surely, 2^{121000020210100} is an apocalyptic number.

121000020210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000020210100 is an abundant number, since it is smaller than the sum of its proper divisors (142895899245068).

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

121000020210100 is a wasteful number, since it uses less digits than its factorization.

121000020210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113625 (or 7113618 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121000020210100 its reverse (1012020000121), we get a palindrome (122012040210221).

The spelling of 121000020210100 in words is "one hundred twenty-one trillion, twenty million, two hundred ten thousand, one hundred".