21122220122122 has 96 divisors (see below), whose sum is σ = 38599806645504. Its totient is φ = 8627022835200.

The previous prime is 21122220122089. The next prime is 21122220122167. The reversal of 21122220122122 is 22122102222112.

It is a super-2 number, since 2×21122220122122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122220122093 and 21122220122102.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1921419058 + ... + 1921430050.

It is an arithmetic number, because the mean of its divisors is an integer number (402081319224).

Almost surely, 2^{21122220122122} is an apocalyptic number.

21122220122122 is a deficient number, since it is larger than the sum of its proper divisors (17477586523382).

21122220122122 is a wasteful number, since it uses less digits than its factorization.

21122220122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14084 (or 14077 counting only the distinct ones).

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

Adding to 21122220122122 its reverse (22122102222112), we get a palindrome (43244322344234).

The spelling of 21122220122122 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".