121200212210000 has 400 divisors, whose sum is σ = 365902899191808. Its totient is φ = 37770667200000.

The previous prime is 121200212209961. The next prime is 121200212210023. The reversal of 121200212210000 is 12212002121.

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 (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9541063649 + ... + 9541076351.

Almost surely, 2^{121200212210000} is an apocalyptic number.

121200212210000 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 121200212210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182951449595904).

121200212210000 is an abundant number, since it is smaller than the sum of its proper divisors (244702686981808).

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

121200212210000 is a wasteful number, since it uses less digits than its factorization.

121200212210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25140 (or 25119 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121200212210000 its reverse (12212002121), we get a palindrome (121212424212121).

The spelling of 121200212210000 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twelve million, two hundred ten thousand".