1221143011001 has 8 divisors (see below), whose sum is σ = 1222842067200. Its totient is φ = 1219444761600.

The previous prime is 1221143010943. The next prime is 1221143011003. The reversal of 1221143011001 is 1001103411221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221143011001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221143011003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2859776 + ... + 3258926.

It is an arithmetic number, because the mean of its divisors is an integer number (152855258400).

Almost surely, 2^{1221143011001} is an apocalyptic number.

It is an amenable number.

1221143011001 is a deficient number, since it is larger than the sum of its proper divisors (1699056199).

1221143011001 is an equidigital number, since it uses as much as digits as its factorization.

1221143011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403399.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1221143011001 its reverse (1001103411221), we get a palindrome (2222246422222).

The spelling of 1221143011001 in words is "one trillion, two hundred twenty-one billion, one hundred forty-three million, eleven thousand, one".