211001023212221 has 8 divisors (see below), whose sum is σ = 230183096224800. Its totient is φ = 191818977168240.

The previous prime is 211001023212107. The next prime is 211001023212311. The reversal of 211001023212221 is 122212320100112.

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-211001023212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211001023212193 and 211001023212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211001023112221) 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, 11844950 + ... + 23712968.

It is an arithmetic number, because the mean of its divisors is an integer number (28772887028100).

Almost surely, 2^{211001023212221} is an apocalyptic number.

It is an amenable number.

211001023212221 is a deficient number, since it is larger than the sum of its proper divisors (19182073012579).

211001023212221 is a wasteful number, since it uses less digits than its factorization.

211001023212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13484299.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211001023212221 its reverse (122212320100112), we get a palindrome (333213343312333).

The spelling of 211001023212221 in words is "two hundred eleven trillion, one billion, twenty-three million, two hundred twelve thousand, two hundred twenty-one".