121000202000000 has 224 divisors, whose sum is σ = 301443494989500. Its totient is φ = 48379443200000.

The previous prime is 121000201999979. The next prime is 121000202000137. The reversal of 121000202000000 is 202000121.

It can be written as a sum of positive squares in 14 ways, for example, as 104911182523456 + 16089019476544 = 10242616^2 + 4011112^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5217988406 + ... + 5218011594.

Almost surely, 2^{121000202000000} is an apocalyptic number.

121000202000000 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 121000202000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150721747494750).

121000202000000 is an abundant number, since it is smaller than the sum of its proper divisors (180443292989500).

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

121000202000000 is an frugal number, since it uses more digits than its factorization.

121000202000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25842 (or 25805 counting only the distinct ones).

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

Adding to 121000202000000 its reverse (202000121), we get a palindrome (121000404000121).

The spelling of 121000202000000 in words is "one hundred twenty-one trillion, two hundred two million", and thus it is an aban number.