21122010122 has 8 divisors (see below), whose sum is σ = 31709576196. Its totient is φ = 10552151392.

The previous prime is 21122010109. The next prime is 21122010127. The reversal of 21122010122 is 22101022112.

It can be written as a sum of positive squares in 2 ways, for example, as 19179757081 + 1942253041 = 138491^2 + 44071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122010122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122010097 and 21122010106.

It is not an unprimeable number, because it can be changed into a prime (21122010127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4423853 + ... + 4428624.

Almost surely, 2^21122010122 is an apocalyptic number.

21122010122 is a deficient number, since it is larger than the sum of its proper divisors (10587566074).

21122010122 is a wasteful number, since it uses less digits than its factorization.

21122010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8853672.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21122010122 its reverse (22101022112), we get a palindrome (43223032234).

The spelling of 21122010122 in words is "twenty-one billion, one hundred twenty-two million, ten thousand, one hundred twenty-two".