2001022010221 has 8 divisors (see below), whose sum is σ = 2155174636160. Its totient is φ = 1846901935152.

The previous prime is 2001022010219. The next prime is 2001022010237. The reversal of 2001022010221 is 1220102201002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2001022010221 - 2¹ = 2001022010219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001022010021) 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, 8009961 + ... + 8255998.

It is an arithmetic number, because the mean of its divisors is an integer number (269396829520).

Almost surely, 2^{2001022010221} is an apocalyptic number.

It is an amenable number.

2001022010221 is a deficient number, since it is larger than the sum of its proper divisors (154152625939).

2001022010221 is a wasteful number, since it uses less digits than its factorization.

2001022010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16275435.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001022010221 its reverse (1220102201002), we get a palindrome (3221124211223).

The spelling of 2001022010221 in words is "two trillion, one billion, twenty-two million, ten thousand, two hundred twenty-one".