1210002121200 has 120 divisors (see below), whose sum is σ = 3881083452400. Its totient is φ = 322247393280.

The previous prime is 1210002121177. The next prime is 1210002121243. The reversal of 1210002121200 is 21212000121.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 267186 + ... + 1578414.

Almost surely, 2^{1210002121200} is an apocalyptic number.

1210002121200 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 1210002121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1940541726200).

1210002121200 is an abundant number, since it is smaller than the sum of its proper divisors (2671081331200).

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

1210002121200 is a wasteful number, since it uses less digits than its factorization.

1210002121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312019 (or 1312008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1210002121200 its reverse (21212000121), we get a palindrome (1231214121321).

The spelling of 1210002121200 in words is "one trillion, two hundred ten billion, two million, one hundred twenty-one thousand, two hundred".