1122420421 has 4 divisors (see below), whose sum is σ = 1181495200. Its totient is φ = 1063345644.

The previous prime is 1122420407. The next prime is 1122420433. The reversal of 1122420421 is 1240242211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1240242211 = 13 ⋅95403247.

It is a cyclic number.

It is not a de Polignac number, because 1122420421 - 2⁷ = 1122420293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 59074759 = 1122420421 / (1 + 1 + 2 + 2 + 4 + 2 + 0 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122420451) 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, 29537361 + ... + 29537398.

It is an arithmetic number, because the mean of its divisors is an integer number (295373800).

Almost surely, 2^1122420421 is an apocalyptic number.

It is an amenable number.

1122420421 is a deficient number, since it is larger than the sum of its proper divisors (59074779).

1122420421 is an equidigital number, since it uses as much as digits as its factorization.

1122420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59074778.

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

The square root of 1122420421 is about 33502.5435004568. The cubic root of 1122420421 is about 1039.2463786487.

Adding to 1122420421 its reverse (1240242211), we get a palindrome (2362662632).

The spelling of 1122420421 in words is "one billion, one hundred twenty-two million, four hundred twenty thousand, four hundred twenty-one".