1122222021 has 4 divisors (see below), whose sum is σ = 1496296032. Its totient is φ = 748148012.

The previous prime is 1122222007. The next prime is 1122222089. The reversal of 1122222021 is 1202222211.

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.

It is a cyclic number.

It is not a de Polignac number, because 1122222021 - 2¹⁵ = 1122189253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122222221) 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, 187037001 + ... + 187037006.

It is an arithmetic number, because the mean of its divisors is an integer number (374074008).

Almost surely, 2^1122222021 is an apocalyptic number.

It is an amenable number.

1122222021 is a deficient number, since it is larger than the sum of its proper divisors (374074011).

1122222021 is an equidigital number, since it uses as much as digits as its factorization.

1122222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374074010.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1122222021 is about 33499.5824003822. The cubic root of 1122222021 is about 1039.1851423456.

Adding to 1122222021 its reverse (1202222211), we get a palindrome (2324444232).

The spelling of 1122222021 in words is "one billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".