1251310230220 has 48 divisors (see below), whose sum is σ = 2635624631808. Its totient is φ = 499025188800.

The previous prime is 1251310230169. The next prime is 1251310230223. The reversal of 1251310230220 is 220320131521.

It is a junction number, because it is equal to n+sod(n) for n = 1251310230191 and 1251310230200.

It is not an unprimeable number, because it can be changed into a prime (1251310230223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29713299 + ... + 29755381.

It is an arithmetic number, because the mean of its divisors is an integer number (54908846496).

Almost surely, 2^{1251310230220} is an apocalyptic number.

1251310230220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251310230220 is an abundant number, since it is smaller than the sum of its proper divisors (1384314401588).

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

1251310230220 is a wasteful number, since it uses less digits than its factorization.

1251310230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46510 (or 46508 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 1251310230220 its reverse (220320131521), we get a palindrome (1471630361741).

The spelling of 1251310230220 in words is "one trillion, two hundred fifty-one billion, three hundred ten million, two hundred thirty thousand, two hundred twenty".