21220100121122 has 12 divisors (see below), whose sum is σ = 37026909395190. Its totient is φ = 9094328623296.

The previous prime is 21220100121119. The next prime is 21220100121191. The reversal of 21220100121122 is 22112100102212.

It can be written as a sum of positive squares in only one way, i.e., 11389686769321 + 9830413351801 = 3374861^2 + 3135349^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21220100121122.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108265816847 + ... + 108265817042.

Almost surely, 2^{21220100121122} is an apocalyptic number.

21220100121122 is a deficient number, since it is larger than the sum of its proper divisors (15806809274068).

21220100121122 is a wasteful number, since it uses less digits than its factorization.

21220100121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216531633905 (or 216531633898 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21220100121122 its reverse (22112100102212), we get a palindrome (43332200223334).

The spelling of 21220100121122 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, one hundred twenty-one thousand, one hundred twenty-two".