1251331241200 has 30 divisors (see below), whose sum is σ = 3006323307944. Its totient is φ = 500532496320.

The previous prime is 1251331241191. The next prime is 1251331241201. The reversal of 1251331241200 is 21421331521.

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 (1251331241201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1564163652 + ... + 1564164451.

Almost surely, 2^{1251331241200} is an apocalyptic number.

1251331241200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251331241200 is an abundant number, since it is smaller than the sum of its proper divisors (1754992066744).

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

1251331241200 is a wasteful number, since it uses less digits than its factorization.

1251331241200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128328121 (or 3128328110 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1251331241200 its reverse (21421331521), we get a palindrome (1272752572721).

The spelling of 1251331241200 in words is "one trillion, two hundred fifty-one billion, three hundred thirty-one million, two hundred forty-one thousand, two hundred".