121102020200020 has 288 divisors, whose sum is σ = 279491202224640. Its totient is φ = 44042592337920.

The previous prime is 121102020199991. The next prime is 121102020200023. The reversal of 121102020200020 is 20002020201121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102020200023) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14820950535 + ... + 14820958705.

It is an arithmetic number, because the mean of its divisors is an integer number (970455563280).

Almost surely, 2^{121102020200020} is an apocalyptic number.

121102020200020 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 121102020200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139745601112320).

121102020200020 is an abundant number, since it is smaller than the sum of its proper divisors (158389182024620).

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

121102020200020 is a wasteful number, since it uses less digits than its factorization.

121102020200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963 (or 8944 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121102020200020 its reverse (20002020201121), we get a palindrome (141104040401141).

The spelling of 121102020200020 in words is "one hundred twenty-one trillion, one hundred two billion, twenty million, two hundred thousand, twenty".