121102200020 has 12 divisors (see below), whose sum is σ = 254314620084. Its totient is φ = 48440880000.

The previous prime is 121102200013. The next prime is 121102200029. The reversal of 121102200020 is 20002201121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50284474564 + 70817725456 = 224242^2 + 266116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121102199974 and 121102200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102200029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027554981 + ... + 3027555020.

It is an arithmetic number, because the mean of its divisors is an integer number (21192885007).

Almost surely, 2^121102200020 is an apocalyptic number.

121102200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102200020 is an abundant number, since it is smaller than the sum of its proper divisors (133212420064).

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

121102200020 is a wasteful number, since it uses less digits than its factorization.

121102200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055110010 (or 6055110008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121102200020 its reverse (20002201121), we get a palindrome (141104401141).

The spelling of 121102200020 in words is "one hundred twenty-one billion, one hundred two million, two hundred thousand, twenty".