21132122 has 16 divisors (see below), whose sum is σ = 36614592. Its totient is φ = 9040320.

The previous prime is 21132119. The next prime is 21132127. The reversal of 21132122 is 22123112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21132097 and 21132106.

It is not an unprimeable number, because it can be changed into a prime (21132127) 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, 27878 + ... + 28625.

It is an arithmetic number, because the mean of its divisors is an integer number (2288412).

Almost surely, 2^21132122 is an apocalyptic number.

21132122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21132122 is a deficient number, since it is larger than the sum of its proper divisors (15482470).

21132122 is a wasteful number, since it uses less digits than its factorization.

21132122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56533.

The product of its digits is 48, while the sum is 14.

The square root of 21132122 is about 4596.9687838836. The cubic root of 21132122 is about 276.4698030193.

Adding to 21132122 its reverse (22123112), we get a palindrome (43255234).

The spelling of 21132122 in words is "twenty-one million, one hundred thirty-two thousand, one hundred twenty-two".