1145212051421 has 16 divisors (see below), whose sum is σ = 1154648018688. Its totient is φ = 1135802304000.

The previous prime is 1145212051391. The next prime is 1145212051441. The reversal of 1145212051421 is 1241502125411.

It is a cyclic number.

It is not a de Polignac number, because 1145212051421 - 2³⁰ = 1144138309597 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 (1145212051441) 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, 409441595 + ... + 409444391.

It is an arithmetic number, because the mean of its divisors is an integer number (72165501168).

Almost surely, 2^{1145212051421} is an apocalyptic number.

It is an amenable number.

1145212051421 is a deficient number, since it is larger than the sum of its proper divisors (9435967267).

1145212051421 is a wasteful number, since it uses less digits than its factorization.

1145212051421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332.

The product of its (nonzero) digits is 3200, while the sum is 29.

Adding to 1145212051421 its reverse (1241502125411), we get a palindrome (2386714176832).

The spelling of 1145212051421 in words is "one trillion, one hundred forty-five billion, two hundred twelve million, fifty-one thousand, four hundred twenty-one".