1221003133001 has 4 divisors (see below), whose sum is σ = 1221014249232. Its totient is φ = 1220992016772.

The previous prime is 1221003132989. The next prime is 1221003133013. The reversal of 1221003133001 is 1003313001221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1221003132989) and next prime (1221003133013).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221003133001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221003163001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5391695 + ... + 5613588.

It is an arithmetic number, because the mean of its divisors is an integer number (305253562308).

Almost surely, 2^{1221003133001} is an apocalyptic number.

It is an amenable number.

1221003133001 is a deficient number, since it is larger than the sum of its proper divisors (11116231).

1221003133001 is a wasteful number, since it uses less digits than its factorization.

1221003133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11116230.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1221003133001 its reverse (1003313001221), we get a palindrome (2224316134222).

The spelling of 1221003133001 in words is "one trillion, two hundred twenty-one billion, three million, one hundred thirty-three thousand, one".