21121222122122 has 16 divisors (see below), whose sum is σ = 32356132515072. Its totient is φ = 10335847641840.

The previous prime is 21121222122097. The next prime is 21121222122197. The reversal of 21121222122122 is 22122122212112.

It is a super-2 number, since 2×21121222122122² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 15027323 + ... + 16372625.

It is an arithmetic number, because the mean of its divisors is an integer number (2022258282192).

Almost surely, 2^{21121222122122} is an apocalyptic number.

21121222122122 is a deficient number, since it is larger than the sum of its proper divisors (11234910392950).

21121222122122 is a wasteful number, since it uses less digits than its factorization.

21121222122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512373.

The product of its digits is 512, while the sum is 23.

Adding to 21121222122122 its reverse (22122122212112), we get a palindrome (43243344334234).

The spelling of 21121222122122 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-two".