21202211122 has 8 divisors (see below), whose sum is σ = 31804380972. Its totient is φ = 10600750800.

The previous prime is 21202211119. The next prime is 21202211159. The reversal of 21202211122 is 22111220212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18403906921 + 2798304201 = 135661^2 + 52899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21202211096 and 21202211105.

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, 95029 + ... + 226792.

Almost surely, 2^21202211122 is an apocalyptic number.

21202211122 is a deficient number, since it is larger than the sum of its proper divisors (10602169850).

21202211122 is a wasteful number, since it uses less digits than its factorization.

21202211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354764.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202211122 its reverse (22111220212), we get a palindrome (43313431334).

It can be divided in two parts, 21202 and 211122, that added together give a square (232324 = 482²).

The spelling of 21202211122 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, one hundred twenty-two".