211212020002221 has 48 divisors (see below), whose sum is σ = 366824831213568. Its totient is φ = 114566459616000.

The previous prime is 211212020002219. The next prime is 211212020002229. The reversal of 211212020002221 is 122200020212112.

It is a happy number.

211212020002221 is a `hidden beast` number, since 211 + 212 + 0 + 20 + 0 + 0 + 2 + 221 = 666.

It is not a de Polignac number, because 211212020002221 - 2¹ = 211212020002219 is a prime.

It is a super-2 number, since 2×211212020002221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211212020002194 and 211212020002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212020002229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1104905005 + ... + 1105096146.

It is an arithmetic number, because the mean of its divisors is an integer number (7642183983616).

Almost surely, 2^{211212020002221} is an apocalyptic number.

211212020002221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211212020002221 is a deficient number, since it is larger than the sum of its proper divisors (155612811211347).

211212020002221 is a wasteful number, since it uses less digits than its factorization.

211212020002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210001242 (or 2210001239 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211212020002221 its reverse (122200020212112), we get a palindrome (333412040214333).

The spelling of 211212020002221 in words is "two hundred eleven trillion, two hundred twelve billion, twenty million, two thousand, two hundred twenty-one".