21022122012122 has 128 divisors (see below), whose sum is σ = 39764830887936. Its totient is φ = 8097148800000.

The previous prime is 21022122012121. The next prime is 21022122012127. The reversal of 21022122012122 is 22121022122012.

It is a super-2 number, since 2×21022122012122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21022122012094 and 21022122012103.

It is not an unprimeable number, because it can be changed into a prime (21022122012121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7870504847 + ... + 7870507517.

It is an arithmetic number, because the mean of its divisors is an integer number (310662741312).

Almost surely, 2^{21022122012122} is an apocalyptic number.

21022122012122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21022122012122 is a deficient number, since it is larger than the sum of its proper divisors (18742708875814).

21022122012122 is a wasteful number, since it uses less digits than its factorization.

21022122012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21022122012122 its reverse (22121022122012), we get a palindrome (43143144134134).

The spelling of 21022122012122 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-two million, twelve thousand, one hundred twenty-two".