21062122 has 4 divisors (see below), whose sum is σ = 31593186. Its totient is φ = 10531060.

The previous prime is 21062101. The next prime is 21062137. The reversal of 21062122 is 22126012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18309841 + 2752281 = 4279^2 + 1659^2 .

It is a super-2 number, since 2×21062122² = 887225966285768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21062096 and 21062105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265529 + ... + 5265532.

Almost surely, 2^21062122 is an apocalyptic number.

21062122 is a deficient number, since it is larger than the sum of its proper divisors (10531064).

21062122 is a wasteful number, since it uses less digits than its factorization.

21062122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10531063.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21062122 is about 4589.3487555426. The cubic root of 21062122 is about 276.1641972628.

Adding to 21062122 its reverse (22126012), we get a palindrome (43188134).

The spelling of 21062122 in words is "twenty-one million, sixty-two thousand, one hundred twenty-two".