1251151214320 has 80 divisors (see below), whose sum is σ = 3353907925440. Its totient is φ = 425169948672.

The previous prime is 1251151214317. The next prime is 1251151214371. The reversal of 1251151214320 is 234121511521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1251151214320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9822555 + ... + 9949114.

It is an arithmetic number, because the mean of its divisors is an integer number (41923849068).

Almost surely, 2^{1251151214320} is an apocalyptic number.

1251151214320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251151214320 is an abundant number, since it is smaller than the sum of its proper divisors (2102756711120).

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

1251151214320 is a wasteful number, since it uses less digits than its factorization.

1251151214320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19771802 (or 19771796 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 1251151214320 its reverse (234121511521), we get a palindrome (1485272725841).

The spelling of 1251151214320 in words is "one trillion, two hundred fifty-one billion, one hundred fifty-one million, two hundred fourteen thousand, three hundred twenty".