21422031210 has 48 divisors (see below), whose sum is σ = 56019271464. Its totient is φ = 5679517056.

The previous prime is 21422031139. The next prime is 21422031217. The reversal of 21422031210 is 1213022412.

It is a happy number.

21422031210 is a `hidden beast` number, since 2 + 1 + 422 + 0 + 31 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20998618281 + 423412929 = 144909^2 + 20577^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21422031217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 672357 + ... + 703496.

Almost surely, 2^21422031210 is an apocalyptic number.

21422031210 is an abundant number, since it is smaller than the sum of its proper divisors (34597240254).

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

21422031210 is a wasteful number, since it uses less digits than its factorization.

21422031210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376039 (or 1376036 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21422031210 its reverse (1213022412), we get a palindrome (22635053622).

The spelling of 21422031210 in words is "twenty-one billion, four hundred twenty-two million, thirty-one thousand, two hundred ten".