1211412400 has 60 divisors (see below), whose sum is σ = 3175013304. Its totient is φ = 440512000.

The previous prime is 1211412329. The next prime is 1211412407. The reversal of 1211412400 is 42141121.

It is a happy number.

It is a super-3 number, since 3×1211412400³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1211412407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133261 + ... + 142060.

Almost surely, 2^1211412400 is an apocalyptic number.

1211412400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211412400 is an abundant number, since it is smaller than the sum of its proper divisors (1963600904).

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

1211412400 is a wasteful number, since it uses less digits than its factorization.

1211412400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275350 (or 275339 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1211412400 is about 34805.3501634447. The cubic root of 1211412400 is about 1066.0166916908.

Adding to 1211412400 its reverse (42141121), we get a palindrome (1253553521).

The spelling of 1211412400 in words is "one billion, two hundred eleven million, four hundred twelve thousand, four hundred".