1231524021452 has 12 divisors (see below), whose sum is σ = 2155293774816. Its totient is φ = 615725800080.

The previous prime is 1231524021437. The next prime is 1231524021503. The reversal of 1231524021452 is 2541204251321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8976068 + ... + 9112235.

It is an arithmetic number, because the mean of its divisors is an integer number (179607814568).

Almost surely, 2^{1231524021452} is an apocalyptic number.

It is an amenable number.

1231524021452 is a deficient number, since it is larger than the sum of its proper divisors (923769753364).

1231524021452 is a wasteful number, since it uses less digits than its factorization.

1231524021452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18105328 (or 18105326 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 1231524021452 its reverse (2541204251321), we get a palindrome (3772728272773).

The spelling of 1231524021452 in words is "one trillion, two hundred thirty-one billion, five hundred twenty-four million, twenty-one thousand, four hundred fifty-two".