1121144240421 has 12 divisors (see below), whose sum is σ = 1619494109740. Its totient is φ = 747400167360.

The previous prime is 1121144240413. The next prime is 1121144240423. The reversal of 1121144240421 is 1240424411211.

1121144240421 is a `hidden beast` number, since 1 + 1 + 211 + 4 + 4 + 24 + 0 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 793811503521 + 327332736900 = 890961^2 + 572130^2 .

It is not a de Polignac number, because 1121144240421 - 2³ = 1121144240413 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 (1121144240423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2200456 + ... + 2661633.

Almost surely, 2^{1121144240421} is an apocalyptic number.

It is an amenable number.

1121144240421 is a deficient number, since it is larger than the sum of its proper divisors (498349869319).

1121144240421 is a wasteful number, since it uses less digits than its factorization.

1121144240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887716 (or 4887713 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 1121144240421 its reverse (1240424411211), we get a palindrome (2361568651632).

The spelling of 1121144240421 in words is "one trillion, one hundred twenty-one billion, one hundred forty-four million, two hundred forty thousand, four hundred twenty-one".