211010212012221 has 24 divisors (see below), whose sum is σ = 313403263904640. Its totient is φ = 136708352233056.

The previous prime is 211010212012151. The next prime is 211010212012289. The reversal of 211010212012221 is 122210212010112.

211010212012221 is a `hidden beast` number, since 211 + 0 + 10 + 21 + 201 + 2 + 221 = 666.

It is not a de Polignac number, because 211010212012221 - 2¹⁵ = 211010211979453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211010212012194 and 211010212012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010212019221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 377351305 + ... + 377910078.

It is an arithmetic number, because the mean of its divisors is an integer number (13058469329360).

Almost surely, 2^{211010212012221} is an apocalyptic number.

It is an amenable number.

211010212012221 is a deficient number, since it is larger than the sum of its proper divisors (102393051892419).

211010212012221 is a wasteful number, since it uses less digits than its factorization.

211010212012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755262265 (or 755262262 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211010212012221 its reverse (122210212010112), we get a palindrome (333220424022333).

The spelling of 211010212012221 in words is "two hundred eleven trillion, ten billion, two hundred twelve million, twelve thousand, two hundred twenty-one".