221210222012122 has 12 divisors (see below), whose sum is σ = 385989264939690. Its totient is φ = 94804380862296.

The previous prime is 221210222012081. The next prime is 221210222012141.

221210222012122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 166673754627961 + 54536467384161 = 12910219^2 + 7384881^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221210222012093 and 221210222012102.

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, 1128623581597 + ... + 1128623581792.

Almost surely, 2^{221210222012122} is an apocalyptic number.

221210222012122 is a deficient number, since it is larger than the sum of its proper divisors (164779042927568).

221210222012122 is a wasteful number, since it uses less digits than its factorization.

221210222012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257247163405 (or 2257247163398 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The spelling of 221210222012122 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-two million, twelve thousand, one hundred twenty-two".