1221132133200 has 240 divisors, whose sum is σ = 4546279733760. Its totient is φ = 274385026560.

The previous prime is 1221132133183. The next prime is 1221132133267. The reversal of 1221132133200 is 23312311221.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 736374 + ... + 1727573.

It is an arithmetic number, because the mean of its divisors is an integer number (18942832224).

Almost surely, 2^{1221132133200} is an apocalyptic number.

1221132133200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221132133200 is an abundant number, since it is smaller than the sum of its proper divisors (3325147600560).

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

1221132133200 is a wasteful number, since it uses less digits than its factorization.

1221132133200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464034 (or 2464023 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221132133200 its reverse (23312311221), we get a palindrome (1244444444421).

The spelling of 1221132133200 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, one hundred thirty-three thousand, two hundred".