21022232212 has 12 divisors (see below), whose sum is σ = 36790449696. Its totient is φ = 10510675160.

The previous prime is 21022232201. The next prime is 21022232221. The reversal of 21022232212 is 21223222012.

It is a super-3 number, since 3×21022232212³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21022232212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12123 + ... + 205405.

It is an arithmetic number, because the mean of its divisors is an integer number (3065870808).

Almost surely, 2^21022232212 is an apocalyptic number.

It is an amenable number.

21022232212 is a deficient number, since it is larger than the sum of its proper divisors (15768217484).

21022232212 is a wasteful number, since it uses less digits than its factorization.

21022232212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220478 (or 220476 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21022232212 its reverse (21223222012), we get a palindrome (42245454224).

The spelling of 21022232212 in words is "twenty-one billion, twenty-two million, two hundred thirty-two thousand, two hundred twelve".