1142020440421 has 16 divisors (see below), whose sum is σ = 1390889447424. Its totient is φ = 916393295664.

The previous prime is 1142020440397. The next prime is 1142020440469. The reversal of 1142020440421 is 1240440202411.

It is a happy number.

It is not a de Polignac number, because 1142020440421 - 2³¹ = 1139872956773 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 (1142020449421) 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, 75453015 + ... + 75468148.

It is an arithmetic number, because the mean of its divisors is an integer number (86930590464).

Almost surely, 2^{1142020440421} is an apocalyptic number.

It is an amenable number.

1142020440421 is a deficient number, since it is larger than the sum of its proper divisors (248869007003).

1142020440421 is a wasteful number, since it uses less digits than its factorization.

1142020440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150921240.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 1142020440421 its reverse (1240440202411), we get a palindrome (2382460642832).

The spelling of 1142020440421 in words is "one trillion, one hundred forty-two billion, twenty million, four hundred forty thousand, four hundred twenty-one".