21202122 has 32 divisors (see below), whose sum is σ = 43623360. Its totient is φ = 6867200.

The previous prime is 21202121. The next prime is 21202127. The reversal of 21202122 is 22120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202098 and 21202107.

It is not an unprimeable number, because it can be changed into a prime (21202121) 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, 35458 + ... + 36050.

It is an arithmetic number, because the mean of its divisors is an integer number (1363230).

Almost surely, 2^21202122 is an apocalyptic number.

21202122 is an abundant number, since it is smaller than the sum of its proper divisors (22421238).

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

21202122 is a wasteful number, since it uses less digits than its factorization.

21202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21202122 is about 4604.5762019973. The cubic root of 21202122 is about 276.7747346408.

Adding to 21202122 its reverse (22120212), we get a palindrome (43322334).

It can be divided in two parts, 2120212 and 2, that multiplied together give a palindrome (4240424).

The spelling of 21202122 in words is "twenty-one million, two hundred two thousand, one hundred twenty-two".