1231451151442 has 16 divisors (see below), whose sum is σ = 1964017601280. Its totient is φ = 577081707328.

The previous prime is 1231451151433. The next prime is 1231451151487. The reversal of 1231451151442 is 2441511541321.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1231451151398 and 1231451151407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75764158 + ... + 75780409.

It is an arithmetic number, because the mean of its divisors is an integer number (122751100080).

Almost surely, 2^{1231451151442} is an apocalyptic number.

1231451151442 is a deficient number, since it is larger than the sum of its proper divisors (732566449838).

1231451151442 is a wasteful number, since it uses less digits than its factorization.

1231451151442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151544825.

The product of its digits is 19200, while the sum is 34.

Adding to 1231451151442 its reverse (2441511541321), we get a palindrome (3672962692763).

The spelling of 1231451151442 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-one million, one hundred fifty-one thousand, four hundred forty-two".