1122164021 has 4 divisors (see below), whose sum is σ = 1224178944. Its totient is φ = 1020149100.

The previous prime is 1122164003. The next prime is 1122164041. The reversal of 1122164021 is 1204612211.

It is a happy number.

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: 1204612211 = 11 ⋅109510201.

It is a cyclic number.

It is not a de Polignac number, because 1122164021 - 2¹⁸ = 1121901877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122163984 and 1122164002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122164041) 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, 51007445 + ... + 51007466.

It is an arithmetic number, because the mean of its divisors is an integer number (306044736).

Almost surely, 2^1122164021 is an apocalyptic number.

1122164021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122164021 is a deficient number, since it is larger than the sum of its proper divisors (102014923).

1122164021 is a wasteful number, since it uses less digits than its factorization.

1122164021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102014922.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1122164021 is about 33498.7167067636. The cubic root of 1122164021 is about 1039.1672392404.

Adding to 1122164021 its reverse (1204612211), we get a palindrome (2326776232).

The spelling of 1122164021 in words is "one billion, one hundred twenty-two million, one hundred sixty-four thousand, twenty-one".