21202032212 has 12 divisors (see below), whose sum is σ = 37626142176. Its totient is φ = 10451705880.

The previous prime is 21202032191. The next prime is 21202032233. The reversal of 21202032212 is 21223020212.

It is an interprime number because it is at equal distance from previous prime (21202032191) and next prime (21202032233).

It is a super-2 number, since 2×21202032212² (a number of 21 digits) contains 22 as substring.

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, 37327238 + ... + 37327805.

It is an arithmetic number, because the mean of its divisors is an integer number (3135511848).

Almost surely, 2^21202032212 is an apocalyptic number.

It is an amenable number.

21202032212 is a deficient number, since it is larger than the sum of its proper divisors (16424109964).

21202032212 is a wasteful number, since it uses less digits than its factorization.

21202032212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74655118 (or 74655116 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21202032212 its reverse (21223020212), we get a palindrome (42425052424).

The spelling of 21202032212 in words is "twenty-one billion, two hundred two million, thirty-two thousand, two hundred twelve".