1000011211200 has 126 divisors (see below), whose sum is σ = 3554276009544. Its totient is φ = 266669652480.

The previous prime is 1000011211187. The next prime is 1000011211273. The reversal of 1000011211200 is 21121100001.

It is a happy number.

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 polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34708212 + ... + 34737011.

Almost surely, 2^{1000011211200} is an apocalyptic number.

1000011211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000011211200 is an abundant number, since it is smaller than the sum of its proper divisors (2554264798344).

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

1000011211200 is a wasteful number, since it uses less digits than its factorization.

1000011211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69445251 (or 69445233 counting only the distinct ones).

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

Adding to 1000011211200 its reverse (21121100001), we get a palindrome (1021132311201).

The spelling of 1000011211200 in words is "one trillion, eleven million, two hundred eleven thousand, two hundred".