1122005621 has 16 divisors (see below), whose sum is σ = 1269293760. Its totient is φ = 982437120.

The previous prime is 1122005609. The next prime is 1122005629. The reversal of 1122005621 is 1265002211.

It is a cyclic number.

It is not a de Polignac number, because 1122005621 - 2⁶ = 1122005557 is a prime.

It is a super-2 number, since 2×1122005621² = 2517793227111191282, which contains 22 as substring.

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 = 1122005593 and 1122005602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122005629) 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, 134066 + ... + 142188.

It is an arithmetic number, because the mean of its divisors is an integer number (79330860).

Almost surely, 2^1122005621 is an apocalyptic number.

1122005621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122005621 is a deficient number, since it is larger than the sum of its proper divisors (147288139).

1122005621 is a wasteful number, since it uses less digits than its factorization.

1122005621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1122005621 is about 33496.3523536519. The cubic root of 1122005621 is about 1039.1183420996.

Adding to 1122005621 its reverse (1265002211), we get a palindrome (2387007832).

The spelling of 1122005621 in words is "one billion, one hundred twenty-two million, five thousand, six hundred twenty-one".