211220000212 has 24 divisors (see below), whose sum is σ = 398274584456. Its totient is φ = 97435675008.

The previous prime is 211220000209. The next prime is 211220000213. The reversal of 211220000212 is 212000022112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8579575876 + 202640424336 = 92626^2 + 450156^2 .

It is a super-2 number, since 2×211220000212² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 211220000192 and 211220000201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220000213) 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, 950163 + ... + 1151194.

Almost surely, 2^211220000212 is an apocalyptic number.

It is an amenable number.

211220000212 is a deficient number, since it is larger than the sum of its proper divisors (187054584244).

211220000212 is a wasteful number, since it uses less digits than its factorization.

211220000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103307 (or 2103305 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211220000212 its reverse (212000022112), we get a palindrome (423220022324).

The spelling of 211220000212 in words is "two hundred eleven billion, two hundred twenty million, two hundred twelve", and thus it is an aban number.