21220101212122 has 16 divisors (see below), whose sum is σ = 31874513448960. Its totient is φ = 10595263927248.

The previous prime is 21220101212081. The next prime is 21220101212173. The reversal of 21220101212122 is 22121210102212.

It is a self number, because there is not a number n which added to its sum of digits gives 21220101212122.

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, 113433408 + ... + 113620324.

It is an arithmetic number, because the mean of its divisors is an integer number (1992157090560).

Almost surely, 2^{21220101212122} is an apocalyptic number.

21220101212122 is a deficient number, since it is larger than the sum of its proper divisors (10654412236838).

21220101212122 is a wasteful number, since it uses less digits than its factorization.

21220101212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265725.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21220101212122 its reverse (22121210102212), we get a palindrome (43341311314334).

The spelling of 21220101212122 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twelve thousand, one hundred twenty-two".