1223054021 has 16 divisors (see below), whose sum is σ = 1409865600. Its totient is φ = 1039296960.

The previous prime is 1223054017. The next prime is 1223054039. The reversal of 1223054021 is 1204503221.

It is a cyclic number.

It is not a de Polignac number, because 1223054021 - 2² = 1223054017 is a prime.

It is a super-2 number, since 2×1223054021² = 2991722276568536882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223053984 and 1223054002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223054071) 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, 626555 + ... + 628503.

It is an arithmetic number, because the mean of its divisors is an integer number (88116600).

Almost surely, 2^1223054021 is an apocalyptic number.

It is an amenable number.

1223054021 is a deficient number, since it is larger than the sum of its proper divisors (186811579).

1223054021 is a wasteful number, since it uses less digits than its factorization.

1223054021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1223054021 is about 34972.1892508891. The cubic root of 1223054021 is about 1069.4206025542.

Adding to 1223054021 its reverse (1204503221), we get a palindrome (2427557242).

The spelling of 1223054021 in words is "one billion, two hundred twenty-three million, fifty-four thousand, twenty-one".