1231106225 has 12 divisors (see below), whose sum is σ = 1530956700. Its totient is φ = 982056000.

The previous prime is 1231106183. The next prime is 1231106243. The reversal of 1231106225 is 5226011321.

It can be written as a sum of positive squares in 6 ways, for example, as 93528241 + 1137577984 = 9671^2 + 33728^2 .

It is not a de Polignac number, because 1231106225 - 2¹² = 1231102129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231106225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61826 + ... + 79275.

It is an arithmetic number, because the mean of its divisors is an integer number (127579725).

Almost surely, 2^1231106225 is an apocalyptic number.

It is an amenable number.

1231106225 is a deficient number, since it is larger than the sum of its proper divisors (299850475).

1231106225 is a wasteful number, since it uses less digits than its factorization.

1231106225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141460 (or 141455 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1231106225 is about 35087.1233503119. The cubic root of 1231106225 is about 1071.7623807933.

Adding to 1231106225 its reverse (5226011321), we get a palindrome (6457117546).

The spelling of 1231106225 in words is "one billion, two hundred thirty-one million, one hundred six thousand, two hundred twenty-five".