221611116122 has 16 divisors (see below), whose sum is σ = 367603996032. Its totient is φ = 99352429920.

The previous prime is 221611116113. The next prime is 221611116131.

It is a happy number.

221611116122 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (221611116113) and next prime (221611116131).

It is a super-2 number, since 2×221611116122² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221611116091 and 221611116100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68993138 + ... + 68996349.

It is an arithmetic number, because the mean of its divisors is an integer number (22975249752).

Almost surely, 2^221611116122 is an apocalyptic number.

221611116122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221611116122 is a deficient number, since it is larger than the sum of its proper divisors (145992879910).

221611116122 is a wasteful number, since it uses less digits than its factorization.

221611116122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137989573.

The product of its digits is 576, while the sum is 26.

It can be divided in two parts, 221611 and 116122, that added together give a palindrome (337733).

The spelling of 221611116122 in words is "two hundred twenty-one billion, six hundred eleven million, one hundred sixteen thousand, one hundred twenty-two".