1211000023200 has 144 divisors (see below), whose sum is σ = 4300151085216. Its totient is φ = 293575756800.

The previous prime is 1211000023193. The next prime is 1211000023201. The reversal of 1211000023200 is 23200001121.

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

It is not an unprimeable number, because it can be changed into a prime (1211000023201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22909207 + ... + 22962006.

It is an arithmetic number, because the mean of its divisors is an integer number (29862160314).

Almost surely, 2^{1211000023200} is an apocalyptic number.

1211000023200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211000023200 is an abundant number, since it is smaller than the sum of its proper divisors (3089151062016).

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

1211000023200 is a wasteful number, since it uses less digits than its factorization.

1211000023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45871247 (or 45871234 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1211000023200 its reverse (23200001121), we get a palindrome (1234200024321).

The spelling of 1211000023200 in words is "one trillion, two hundred eleven billion, twenty-three thousand, two hundred".