21010211220122 has 8 divisors (see below), whose sum is σ = 31515727037472. Its totient is φ = 10504968874300.

The previous prime is 21010211220121. The next prime is 21010211220133. The reversal of 21010211220122 is 22102211201012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21010211220122.

It is not an unprimeable number, because it can be changed into a prime (21010211220121) 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, 68175704 + ... + 68483187.

It is an arithmetic number, because the mean of its divisors is an integer number (3939465879684).

Almost surely, 2^{21010211220122} is an apocalyptic number.

21010211220122 is a deficient number, since it is larger than the sum of its proper divisors (10505515817350).

21010211220122 is a wasteful number, since it uses less digits than its factorization.

21010211220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136735764.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21010211220122 its reverse (22102211201012), we get a palindrome (43112422421134).

The spelling of 21010211220122 in words is "twenty-one trillion, ten billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-two".