1331121426 has 16 divisors (see below), whose sum is σ = 2662976064. Its totient is φ = 443584944.

The previous prime is 1331121413. The next prime is 1331121439. The reversal of 1331121426 is 6241211331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1331121413) and next prime (1331121439).

It is a junction number, because it is equal to n+sod(n) for n = 1331121396 and 1331121405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5350 + ... + 51873.

It is an arithmetic number, because the mean of its divisors is an integer number (166436004).

Almost surely, 2^1331121426 is an apocalyptic number.

1331121426 is an abundant number, since it is smaller than the sum of its proper divisors (1331854638).

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

1331121426 is a wasteful number, since it uses less digits than its factorization.

1331121426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61105.

The product of its digits is 864, while the sum is 24.

The square root of 1331121426 is about 36484.5368067076. The cubic root of 1331121426 is about 1100.0334496715.

Adding to 1331121426 its reverse (6241211331), we get a palindrome (7572332757).

The spelling of 1331121426 in words is "one billion, three hundred thirty-one million, one hundred twenty-one thousand, four hundred twenty-six".