1122421421 has 4 divisors (see below), whose sum is σ = 1224459744. Its totient is φ = 1020383100.

The previous prime is 1122421403. The next prime is 1122421427. The reversal of 1122421421 is 1241242211.

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: 1241242211 = 11 ⋅112840201.

It is not a de Polignac number, because 1122421421 - 2⁶ = 1122421357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122421393 and 1122421402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122421427) 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, 51019145 + ... + 51019166.

It is an arithmetic number, because the mean of its divisors is an integer number (306114936).

Almost surely, 2^1122421421 is an apocalyptic number.

1122421421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122421421 is a deficient number, since it is larger than the sum of its proper divisors (102038323).

1122421421 is a wasteful number, since it uses less digits than its factorization.

1122421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102038322.

The product of its digits is 256, while the sum is 20.

The square root of 1122421421 is about 33502.5584246935. The cubic root of 1122421421 is about 1039.2466872811.

Adding to 1122421421 its reverse (1241242211), we get a palindrome (2363663632).

The spelling of 1122421421 in words is "one billion, one hundred twenty-two million, four hundred twenty-one thousand, four hundred twenty-one".