1221122023 has 8 divisors (see below), whose sum is σ = 1375105536. Its totient is φ = 1074300600.

The previous prime is 1221122009. The next prime is 1221122059. The reversal of 1221122023 is 3202211221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221122023 - 2⁵ = 1221121991 is a prime.

It is a super-2 number, since 2×1221122023² = 2982277990111225058, 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 = 1221121988 and 1221122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221122083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1790161 + ... + 1790842.

It is an arithmetic number, because the mean of its divisors is an integer number (171888192).

Almost surely, 2^1221122023 is an apocalyptic number.

1221122023 is a deficient number, since it is larger than the sum of its proper divisors (153983513).

1221122023 is a wasteful number, since it uses less digits than its factorization.

1221122023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581045.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221122023 is about 34944.5564144117. The cubic root of 1221122023 is about 1068.8572021645.

Adding to 1221122023 its reverse (3202211221), we get a palindrome (4423333244).

The spelling of 1221122023 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-three".