210001111200 has 108 divisors (see below), whose sum is σ = 740516443758. Its totient is φ = 56000294400.

The previous prime is 210001111193. The next prime is 210001111207. The reversal of 210001111200 is 2111100012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (210001111193) and next prime (210001111207).

It can be written as a sum of positive squares in 3 ways, for example, as 112259842704 + 97741268496 = 335052^2 + 312636^2 .

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

It is not an unprimeable number, because it can be changed into a prime (210001111207) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14576211 + ... + 14590610.

Almost surely, 2^210001111200 is an apocalyptic number.

210001111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001111200 is an abundant number, since it is smaller than the sum of its proper divisors (530515332558).

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

210001111200 is a wasteful number, since it uses less digits than its factorization.

210001111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29166847 (or 29166831 counting only the distinct ones).

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

Adding to 210001111200 its reverse (2111100012), we get a palindrome (212112211212).

It can be divided in two parts, 210001 and 111200, that added together give a triangular number (321201 = T₈₀₁).

The spelling of 210001111200 in words is "two hundred ten billion, one million, one hundred eleven thousand, two hundred".