2021221211201 has 8 divisors (see below), whose sum is σ = 2022481319040. Its totient is φ = 2019961379152.

The previous prime is 2021221211197. The next prime is 2021221211209. The reversal of 2021221211201 is 1021121221202.

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 2021221211201 - 2² = 2021221211197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021221211201.

It is not an unprimeable number, because it can be changed into a prime (2021221211209) 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, 15703415 + ... + 15831603.

It is an arithmetic number, because the mean of its divisors is an integer number (252810164880).

Almost surely, 2^{2021221211201} is an apocalyptic number.

It is an amenable number.

2021221211201 is a deficient number, since it is larger than the sum of its proper divisors (1260107839).

2021221211201 is a wasteful number, since it uses less digits than its factorization.

2021221211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137895.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021221211201 its reverse (1021121221202), we get a palindrome (3042342432403).

The spelling of 2021221211201 in words is "two trillion, twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred one".