1223152121 has 8 divisors (see below), whose sum is σ = 1276687680. Its totient is φ = 1169646192.

The previous prime is 1223152103. The next prime is 1223152123. The reversal of 1223152121 is 1212513221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223152121 is a prime.

It is a super-2 number, since 2×1223152121² = 2992202222213597282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1223152093 and 1223152102.

It is not an unprimeable number, because it can be changed into a prime (1223152123) 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, 137435 + ... + 146063.

It is an arithmetic number, because the mean of its divisors is an integer number (159585960).

Almost surely, 2^1223152121 is an apocalyptic number.

It is an amenable number.

1223152121 is a deficient number, since it is larger than the sum of its proper divisors (53535559).

1223152121 is an equidigital number, since it uses as much as digits as its factorization.

1223152121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14815.

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

The square root of 1223152121 is about 34973.5917657881. The cubic root of 1223152121 is about 1069.4491941930.

Adding to 1223152121 its reverse (1212513221), we get a palindrome (2435665342).

The spelling of 1223152121 in words is "one billion, two hundred twenty-three million, one hundred fifty-two thousand, one hundred twenty-one".