1010121001200 has 360 divisors, whose sum is σ = 3756680280288. Its totient is φ = 250689669120.

The previous prime is 1010121001189. The next prime is 1010121001213. The reversal of 1010121001200 is 21001210101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (9).

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 71 ways as a sum of consecutive naturals, for example, 2898742 + ... + 3228458.

Almost surely, 2^{1010121001200} is an apocalyptic number.

1010121001200 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 1010121001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878340140144).

1010121001200 is an abundant number, since it is smaller than the sum of its proper divisors (2746559279088).

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

1010121001200 is a wasteful number, since it uses less digits than its factorization.

1010121001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329801 (or 329787 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1010121001200 its reverse (21001210101), we get a palindrome (1031122211301).

The spelling of 1010121001200 in words is "one trillion, ten billion, one hundred twenty-one million, one thousand, two hundred".