1221202323 has 48 divisors (see below), whose sum is σ = 1957737600. Its totient is φ = 727372800.

The previous prime is 1221202321. The next prime is 1221202331. The reversal of 1221202323 is 3232021221.

It is not a de Polignac number, because 1221202323 - 2¹ = 1221202321 is a prime.

It is a super-2 number, since 2×1221202323² = 2982670227401192658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221202296 and 1221202305.

It is not an unprimeable number, because it can be changed into a prime (1221202321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2719603 + ... + 2720051.

It is an arithmetic number, because the mean of its divisors is an integer number (40786200).

Almost surely, 2^1221202323 is an apocalyptic number.

1221202323 is a deficient number, since it is larger than the sum of its proper divisors (736535277).

1221202323 is a wasteful number, since it uses less digits than its factorization.

1221202323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1221202323 is about 34945.7053584557. The cubic root of 1221202323 is about 1068.8806307137.

Adding to 1221202323 its reverse (3232021221), we get a palindrome (4453223544).

The spelling of 1221202323 in words is "one billion, two hundred twenty-one million, two hundred two thousand, three hundred twenty-three".