1213542005200 has 120 divisors (see below), whose sum is σ = 3346983223808. Its totient is φ = 414205539840.

The previous prime is 1213542005177. The next prime is 1213542005209. The reversal of 1213542005200 is 25002453121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213542005209) 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, 347367 + ... + 1596166.

Almost surely, 2^{1213542005200} is an apocalyptic number.

1213542005200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213542005200 is an abundant number, since it is smaller than the sum of its proper divisors (2133441218608).

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

1213542005200 is a wasteful number, since it uses less digits than its factorization.

1213542005200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943781 (or 1943770 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 1213542005200 its reverse (25002453121), we get a palindrome (1238544458321).

The spelling of 1213542005200 in words is "one trillion, two hundred thirteen billion, five hundred forty-two million, five thousand, two hundred".