1111422140021 has 4 divisors (see below), whose sum is σ = 1132392369132. Its totient is φ = 1090451910912.

The previous prime is 1111422140011. The next prime is 1111422140039. The reversal of 1111422140021 is 1200412241111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 794183968900 + 317238171121 = 891170^2 + 563239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111422140021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111422139975 and 1111422140002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111422140011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10485114476 + ... + 10485114581.

It is an arithmetic number, because the mean of its divisors is an integer number (283098092283).

Almost surely, 2^{1111422140021} is an apocalyptic number.

It is an amenable number.

1111422140021 is a deficient number, since it is larger than the sum of its proper divisors (20970229111).

1111422140021 is an equidigital number, since it uses as much as digits as its factorization.

1111422140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20970229110.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1111422140021 its reverse (1200412241111), we get a palindrome (2311834381132).

The spelling of 1111422140021 in words is "one trillion, one hundred eleven billion, four hundred twenty-two million, one hundred forty thousand, twenty-one".