1201001221001 has 8 divisors (see below), whose sum is σ = 1304992838400. Its totient is φ = 1101087706320.

The previous prime is 1201001220977. The next prime is 1201001221037. The reversal of 1201001221001 is 1001221001021.

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-1201001221001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201001221081) 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, 1019525066 + ... + 1019526243.

It is an arithmetic number, because the mean of its divisors is an integer number (163124104800).

Almost surely, 2^{1201001221001} is an apocalyptic number.

It is an amenable number.

1201001221001 is a deficient number, since it is larger than the sum of its proper divisors (103991617399).

1201001221001 is a wasteful number, since it uses less digits than its factorization.

1201001221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039051359.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201001221001 its reverse (1001221001021), we get a palindrome (2202222222022).

The spelling of 1201001221001 in words is "one trillion, two hundred one billion, one million, two hundred twenty-one thousand, one".