2021221022001 has 8 divisors (see below), whose sum is σ = 2695059332640. Its totient is φ = 1347431696352.

The previous prime is 2021221021997. The next prime is 2021221022003. The reversal of 2021221022001 is 1002201221202.

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

It is not a de Polignac number, because 2021221022001 - 2² = 2021221021997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021221022003) 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, 12149860 + ... + 12315093.

It is an arithmetic number, because the mean of its divisors is an integer number (336882416580).

Almost surely, 2^{2021221022001} is an apocalyptic number.

It is an amenable number.

2021221022001 is a deficient number, since it is larger than the sum of its proper divisors (673838310639).

2021221022001 is a wasteful number, since it uses less digits than its factorization.

2021221022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24492495.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021221022001 its reverse (1002201221202), we get a palindrome (3023422243203).

The spelling of 2021221022001 in words is "two trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, one".