1311226125220 has 24 divisors (see below), whose sum is σ = 3003899851008. Its totient is φ = 476809500000.

The previous prime is 1311226125199. The next prime is 1311226125227. The reversal of 1311226125220 is 225216221131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1311226125227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980059156 + ... + 2980059595.

It is an arithmetic number, because the mean of its divisors is an integer number (125162493792).

Almost surely, 2^{1311226125220} is an apocalyptic number.

1311226125220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311226125220 is an abundant number, since it is smaller than the sum of its proper divisors (1692673725788).

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

1311226125220 is a wasteful number, since it uses less digits than its factorization.

1311226125220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960118771 (or 5960118769 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 1311226125220 in words is "one trillion, three hundred eleven billion, two hundred twenty-six million, one hundred twenty-five thousand, two hundred twenty".