1001201331021 has 8 divisors (see below), whose sum is σ = 1371014435424. Its totient is φ = 649427890320.

The previous prime is 1001201330957. The next prime is 1001201331049. The reversal of 1001201331021 is 1201331021001.

It is a happy number.

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

It is not a de Polignac number, because 1001201331021 - 2⁶ = 1001201330957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001201331421) 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, 4509915795 + ... + 4509916016.

It is an arithmetic number, because the mean of its divisors is an integer number (171376804428).

Almost surely, 2^{1001201331021} is an apocalyptic number.

It is an amenable number.

1001201331021 is a deficient number, since it is larger than the sum of its proper divisors (369813104403).

1001201331021 is an equidigital number, since it uses as much as digits as its factorization.

1001201331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9019831851.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1001201331021 its reverse (1201331021001), we get a palindrome (2202532352022).

The spelling of 1001201331021 in words is "one trillion, one billion, two hundred one million, three hundred thirty-one thousand, twenty-one".