1223012121 has 32 divisors (see below), whose sum is σ = 1752192000. Its totient is φ = 756474048.

The previous prime is 1223012081. The next prime is 1223012123. The reversal of 1223012121 is 1212103221.

It is not a de Polignac number, because 1223012121 - 2⁹ = 1223011609 is a prime.

It is a super-2 number, since 2×1223012121² = 2991517296225837282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223012121.

It is not an unprimeable number, because it can be changed into a prime (1223012123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1206811 + ... + 1207823.

It is an arithmetic number, because the mean of its divisors is an integer number (54756000).

Almost surely, 2^1223012121 is an apocalyptic number.

It is an amenable number.

1223012121 is a deficient number, since it is larger than the sum of its proper divisors (529179879).

1223012121 is a wasteful number, since it uses less digits than its factorization.

1223012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1223012121 is about 34971.5901983310. The cubic root of 1223012121 is about 1069.4083901651.

Adding to 1223012121 its reverse (1212103221), we get a palindrome (2435115342).

The spelling of 1223012121 in words is "one billion, two hundred twenty-three million, twelve thousand, one hundred twenty-one".