221211202020001 has 8 divisors (see below), whose sum is σ = 222242863756320. Its totient is φ = 220181609817312.

The previous prime is 221211202019989. The next prime is 221211202020013. The reversal of 221211202020001 is 100020202112122.

It is a happy number.

221211202020001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221211202019989) and next prime (221211202020013).

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-221211202020001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211202020041) 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, 517169131 + ... + 517596688.

It is an arithmetic number, because the mean of its divisors is an integer number (27780357969540).

Almost surely, 2^{221211202020001} is an apocalyptic number.

It is an amenable number.

221211202020001 is a deficient number, since it is larger than the sum of its proper divisors (1031661736319).

221211202020001 is a wasteful number, since it uses less digits than its factorization.

221211202020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034766815.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221211202020001 its reverse (100020202112122), we get a palindrome (321231404132123).

The spelling of 221211202020001 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred two million, twenty thousand, one".