1211311425 has 48 divisors (see below), whose sum is σ = 2044760000. Its totient is φ = 632586240.

The previous prime is 1211311403. The next prime is 1211311471. The reversal of 1211311425 is 5241131121.

It is not a de Polignac number, because 1211311425 - 2¹² = 1211307329 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 969201 + ... + 970449.

Almost surely, 2^1211311425 is an apocalyptic number.

1211311425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211311425 is a deficient number, since it is larger than the sum of its proper divisors (833448575).

1211311425 is a wasteful number, since it uses less digits than its factorization.

1211311425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 1517 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 1211311425 is about 34803.8995659969. The cubic root of 1211311425 is about 1065.9870722630.

Adding to 1211311425 its reverse (5241131121), we get a palindrome (6452442546).

The spelling of 1211311425 in words is "one billion, two hundred eleven million, three hundred eleven thousand, four hundred twenty-five".