1231351225149 has 8 divisors (see below), whose sum is σ = 1642421894080. Its totient is φ = 820590686496.

The previous prime is 1231351225121. The next prime is 1231351225177. The reversal of 1231351225149 is 9415221531321.

It is an interprime number because it is at equal distance from previous prime (1231351225121) and next prime (1231351225177).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231351225149 - 2²¹ = 1231349127997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231351225249) 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, 77523304 + ... + 77539185.

It is an arithmetic number, because the mean of its divisors is an integer number (205302736760).

Almost surely, 2^{1231351225149} is an apocalyptic number.

It is an amenable number.

1231351225149 is a deficient number, since it is larger than the sum of its proper divisors (411070668931).

1231351225149 is a wasteful number, since it uses less digits than its factorization.

1231351225149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155065139.

The product of its digits is 64800, while the sum is 39.

The spelling of 1231351225149 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-one million, two hundred twenty-five thousand, one hundred forty-nine".