1420112021 has 4 divisors (see below), whose sum is σ = 1426004844. Its totient is φ = 1414219200.

The previous prime is 1420112011. The next prime is 1420112047. The reversal of 1420112021 is 1202110241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1202110241 = 7583 ⋅158527.

It can be written as a sum of positive squares in 2 ways, for example, as 876988996 + 543123025 = 29614^2 + 23305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420112021 - 2³⁰ = 346370197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420111987 and 1420112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420112011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2946050 + ... + 2946531.

It is an arithmetic number, because the mean of its divisors is an integer number (356501211).

Almost surely, 2^1420112021 is an apocalyptic number.

It is an amenable number.

1420112021 is a deficient number, since it is larger than the sum of its proper divisors (5892823).

1420112021 is an equidigital number, since it uses as much as digits as its factorization.

1420112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892822.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1420112021 is about 37684.3736978605. The cubic root of 1420112021 is about 1124.0204203114.

Adding to 1420112021 its reverse (1202110241), we get a palindrome (2622222262).

The spelling of 1420112021 in words is "one billion, four hundred twenty million, one hundred twelve thousand, twenty-one".