1221222023 has 16 divisors (see below), whose sum is σ = 1437683520. Its totient is φ = 1015545600.

The previous prime is 1221222019. The next prime is 1221222031. The reversal of 1221222023 is 3202221221.

It is a cyclic number.

It is not a de Polignac number, because 1221222023 - 2² = 1221222019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221221992 and 1221222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221222823) 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, 40193 + ... + 63701.

It is an arithmetic number, because the mean of its divisors is an integer number (89855220).

Almost surely, 2^1221222023 is an apocalyptic number.

1221222023 is a deficient number, since it is larger than the sum of its proper divisors (216461497).

1221222023 is a wasteful number, since it uses less digits than its factorization.

1221222023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23738.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1221222023 is about 34945.9872231419. The cubic root of 1221222023 is about 1068.8863782831.

Adding to 1221222023 its reverse (3202221221), we get a palindrome (4423443244).

The spelling of 1221222023 in words is "one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-three".