121220202000 has 160 divisors (see below), whose sum is σ = 391167713664. Its totient is φ = 32296128000.

The previous prime is 121220201981. The next prime is 121220202011. The reversal of 121220202000 is 202022121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7077447 + ... + 7094553.

Almost surely, 2^121220202000 is an apocalyptic number.

121220202000 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 121220202000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195583856832).

121220202000 is an abundant number, since it is smaller than the sum of its proper divisors (269947511664).

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

121220202000 is a wasteful number, since it uses less digits than its factorization.

121220202000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18314 (or 18298 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 121220202000 its reverse (202022121), we get a palindrome (121422224121).

The spelling of 121220202000 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred two thousand".