1231467651321 has 16 divisors (see below), whose sum is σ = 1656576553920. Its totient is φ = 813669373440.

The previous prime is 1231467651317. The next prime is 1231467651343. The reversal of 1231467651321 is 1231567641321.

It is a happy number.

It is not a de Polignac number, because 1231467651321 - 2² = 1231467651317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231467651391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6966966 + ... + 7141536.

It is an arithmetic number, because the mean of its divisors is an integer number (103536034620).

Almost surely, 2^{1231467651321} is an apocalyptic number.

It is an amenable number.

1231467651321 is a deficient number, since it is larger than the sum of its proper divisors (425108902599).

1231467651321 is a wasteful number, since it uses less digits than its factorization.

1231467651321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195496.

The product of its digits is 181440, while the sum is 42.

The spelling of 1231467651321 in words is "one trillion, two hundred thirty-one billion, four hundred sixty-seven million, six hundred fifty-one thousand, three hundred twenty-one".