21010100101222 has 4 divisors (see below), whose sum is σ = 31515150151836. Its totient is φ = 10505050050610.

The previous prime is 21010100101213. The next prime is 21010100101241. The reversal of 21010100101222 is 22210100101012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252525025304 + ... + 5252525025307.

It is an arithmetic number, because the mean of its divisors is an integer number (7878787537959).

Almost surely, 2^{21010100101222} is an apocalyptic number.

21010100101222 is a deficient number, since it is larger than the sum of its proper divisors (10505050050614).

21010100101222 is a wasteful number, since it uses less digits than its factorization.

21010100101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505050050613.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010100101222 its reverse (22210100101012), we get a palindrome (43220200202234).

The spelling of 21010100101222 in words is "twenty-one trillion, ten billion, one hundred million, one hundred one thousand, two hundred twenty-two".