121202220210000 has 400 divisors, whose sum is σ = 397530445137408. Its totient is φ = 31806360000000.

The previous prime is 121202220209971. The next prime is 121202220210011. The reversal of 121202220210000 is 12022202121.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 484584975 + ... + 484835025.

Almost surely, 2^{121202220210000} is an apocalyptic number.

121202220210000 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 121202220210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198765222568704).

121202220210000 is an abundant number, since it is smaller than the sum of its proper divisors (276328224927408).

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

121202220210000 is a wasteful number, since it uses less digits than its factorization.

121202220210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250340 (or 250319 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121202220210000 its reverse (12022202121), we get a palindrome (121214242412121).

The spelling of 121202220210000 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred twenty million, two hundred ten thousand".