1223011321002 has 12 divisors (see below), whose sum is σ = 2649857862210. Its totient is φ = 407670440328.

The previous prime is 1223011320997. The next prime is 1223011321027. The reversal of 1223011321002 is 2001231103221.

It can be written as a sum of positive squares in only one way, i.e., 1090769271201 + 132242049801 = 1044399^2 + 363651^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67945073389 = 1223011321002 / (1 + 2 + 2 + 3 + 0 + 1 + 1 + 3 + 2 + 1 + 0 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33972536677 + ... + 33972536712.

Almost surely, 2^{1223011321002} is an apocalyptic number.

1223011321002 is an abundant number, since it is smaller than the sum of its proper divisors (1426846541208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223011321002 is a wasteful number, since it uses less digits than its factorization.

1223011321002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67945073397 (or 67945073394 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1223011321002 its reverse (2001231103221), we get a palindrome (3224242424223).

The spelling of 1223011321002 in words is "one trillion, two hundred twenty-three billion, eleven million, three hundred twenty-one thousand, two".