2042112421 has 2 divisors, whose sum is σ = 2042112422. Its totient is φ = 2042112420.

The previous prime is 2042112377. The next prime is 2042112463. The reversal of 2042112421 is 1242112402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1756029025 + 286083396 = 41905^2 + 16914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042112421 - 2¹⁵ = 2042079653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2042112481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021056210 + 1021056211.

It is an arithmetic number, because the mean of its divisors is an integer number (1021056211).

Almost surely, 2^2042112421 is an apocalyptic number.

It is an amenable number.

2042112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042112421 is an equidigital number, since it uses as much as digits as its factorization.

2042112421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2042112421 is about 45189.7380054366. The cubic root of 2042112421 is about 1268.7027531210.

Subtracting from 2042112421 its sum of digits (19), we obtain a palindrome (2042112402).

Adding to 2042112421 its reverse (1242112402), we get a palindrome (3284224823).

The spelling of 2042112421 in words is "two billion, forty-two million, one hundred twelve thousand, four hundred twenty-one".