1221110023 has 8 divisors (see below), whose sum is σ = 1400319648. Its totient is φ = 1043091744.

The previous prime is 1221109973. The next prime is 1221110071. The reversal of 1221110023 is 3200111221.

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 1221110023 - 2¹⁷ = 1220978951 is a prime.

It is a super-2 number, since 2×1221110023² = 2982219376542121058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221109985 and 1221110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295636 + ... + 299737.

It is an arithmetic number, because the mean of its divisors is an integer number (175039956).

Almost surely, 2^1221110023 is an apocalyptic number.

1221110023 is a deficient number, since it is larger than the sum of its proper divisors (179209625).

1221110023 is an equidigital number, since it uses as much as digits as its factorization.

1221110023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595673.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1221110023 is about 34944.3847134271. The cubic root of 1221110023 is about 1068.8537009233.

Adding to 1221110023 its reverse (3200111221), we get a palindrome (4421221244).

The spelling of 1221110023 in words is "one billion, two hundred twenty-one million, one hundred ten thousand, twenty-three".