1231451142419 has 2 divisors, whose sum is σ = 1231451142420. Its totient is φ = 1231451142418.

The previous prime is 1231451142403. The next prime is 1231451142451. The reversal of 1231451142419 is 9142411541321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231451142419 - 2⁴ = 1231451142403 is a prime.

It is a super-2 number, since 2×1231451142419² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231451142919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615725571209 + 615725571210.

It is an arithmetic number, because the mean of its divisors is an integer number (615725571210).

Almost surely, 2^{1231451142419} is an apocalyptic number.

1231451142419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231451142419 is an equidigital number, since it uses as much as digits as its factorization.

1231451142419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The spelling of 1231451142419 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-one million, one hundred forty-two thousand, four hundred nineteen".