1122212021 has 16 divisors (see below), whose sum is σ = 1340408064. Its totient is φ = 918618624.

The previous prime is 1122212009. The next prime is 1122212023. The reversal of 1122212021 is 1202122211.

It is not a de Polignac number, because 1122212021 - 2¹⁰ = 1122210997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122211987 and 1122212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122212023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103175 + ... + 113531.

It is an arithmetic number, because the mean of its divisors is an integer number (83775504).

Almost surely, 2^1122212021 is an apocalyptic number.

It is an amenable number.

1122212021 is a deficient number, since it is larger than the sum of its proper divisors (218196043).

1122212021 is a wasteful number, since it uses less digits than its factorization.

1122212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060.

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

The square root of 1122212021 is about 33499.4331444578. The cubic root of 1122212021 is about 1039.1820556473.

Adding to 1122212021 its reverse (1202122211), we get a palindrome (2324334232).

The spelling of 1122212021 in words is "one billion, one hundred twenty-two million, two hundred twelve thousand, twenty-one".