21211112210122 has 16 divisors (see below), whose sum is σ = 32974633665000. Its totient is φ = 10220919629760.

The previous prime is 21211112210117. The next prime is 21211112210129. The reversal of 21211112210122 is 22101221111212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13644151052401 + 7566961157721 = 3693799^2 + 2750811^2 .

It is a super-2 number, since 2×21211112210122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21211112210122.

It is not an unprimeable number, because it can be changed into a prime (21211112210129) 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, 337961997 + ... + 338024752.

Almost surely, 2^{21211112210122} is an apocalyptic number.

21211112210122 is a deficient number, since it is larger than the sum of its proper divisors (11763521454878).

21211112210122 is a wasteful number, since it uses less digits than its factorization.

21211112210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675987321.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21211112210122 its reverse (22101221111212), we get a palindrome (43312333321334).

The spelling of 21211112210122 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, two hundred ten thousand, one hundred twenty-two".