121002220022100 has 144 divisors (see below), whose sum is σ = 368584397630400. Its totient is φ = 30564142801920.

The previous prime is 121002220022053. The next prime is 121002220022113. The reversal of 121002220022100 is 1220022200121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121002220022100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34398222 + ... + 37752378.

Almost surely, 2^{121002220022100} is an apocalyptic number.

121002220022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002220022100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184292198815200).

121002220022100 is an abundant number, since it is smaller than the sum of its proper divisors (247582177608300).

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

121002220022100 is a wasteful number, since it uses less digits than its factorization.

121002220022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360522 (or 3360515 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121002220022100 its reverse (1220022200121), we get a palindrome (122222242222221).

The spelling of 121002220022100 in words is "one hundred twenty-one trillion, two billion, two hundred twenty million, twenty-two thousand, one hundred".