121221201202000 has 160 divisors (see below), whose sum is σ = 298197082879488. Its totient is φ = 47651811200000.

The previous prime is 121221201201979. The next prime is 121221201202061. The reversal of 121221201202000 is 202102122121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42789540 + ... + 45534460.

Almost surely, 2^{121221201202000} is an apocalyptic number.

121221201202000 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 121221201202000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149098541439744).

121221201202000 is an abundant number, since it is smaller than the sum of its proper divisors (176975881677488).

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

121221201202000 is a wasteful number, since it uses less digits than its factorization.

121221201202000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745326 (or 2745310 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121221201202000 its reverse (202102122121), we get a palindrome (121423303324121).

The spelling of 121221201202000 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, two hundred two thousand".