1321021011233 has 32 divisors (see below), whose sum is σ = 1663709399040. Its totient is φ = 1018924479360.

The previous prime is 1321021011203. The next prime is 1321021011239. The reversal of 1321021011233 is 3321101201231.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321021011233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321021011239) 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, 18578573 + ... + 18649541.

It is an arithmetic number, because the mean of its divisors is an integer number (51990918720).

Almost surely, 2^{1321021011233} is an apocalyptic number.

It is an amenable number.

1321021011233 is a deficient number, since it is larger than the sum of its proper divisors (342688387807).

1321021011233 is a wasteful number, since it uses less digits than its factorization.

1321021011233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73437.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321021011233 its reverse (3321101201231), we get a palindrome (4642122212464).

The spelling of 1321021011233 in words is "one trillion, three hundred twenty-one billion, twenty-one million, eleven thousand, two hundred thirty-three".