221101121122 has 12 divisors (see below), whose sum is σ = 385798895190. Its totient is φ = 94757623296.

The previous prime is 221101121089. The next prime is 221101121179. The reversal of 221101121122 is 221121101122.

It can be written as a sum of positive squares in only one way, i.e., 171072404881 + 50028716241 = 413609^2 + 223671^2 .

It is a super-2 number, since 2×221101121122² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221101121096 and 221101121105.

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, 1128066847 + ... + 1128067042.

Almost surely, 2^221101121122 is an apocalyptic number.

221101121122 is a deficient number, since it is larger than the sum of its proper divisors (164697774068).

221101121122 is a wasteful number, since it uses less digits than its factorization.

221101121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256133905 (or 2256133898 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221101121122 its reverse (221121101122), we get a palindrome (442222222244).

The spelling of 221101121122 in words is "two hundred twenty-one billion, one hundred one million, one hundred twenty-one thousand, one hundred twenty-two".