221211010212 has 48 divisors (see below), whose sum is σ = 543767347200. Its totient is φ = 69799272480.

The previous prime is 221211010211. The next prime is 221211010217. The reversal of 221211010212 is 212010112122.

It is a super-2 number, since 2×221211010212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221211010191 and 221211010200.

It is not an unprimeable number, because it can be changed into a prime (221211010211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113412 + ... + 674747.

It is an arithmetic number, because the mean of its divisors is an integer number (11328486400).

Almost surely, 2^221211010212 is an apocalyptic number.

It is an amenable number.

221211010212 is an abundant number, since it is smaller than the sum of its proper divisors (322556336988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221211010212 is a wasteful number, since it uses less digits than its factorization.

221211010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789416 (or 789414 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221211010212 its reverse (212010112122), we get a palindrome (433221122334).

The spelling of 221211010212 in words is "two hundred twenty-one billion, two hundred eleven million, ten thousand, two hundred twelve".