21001311101222 has 8 divisors (see below), whose sum is σ = 31695230251416. Its totient is φ = 10436234350752.

The previous prime is 21001311101213. The next prime is 21001311101231. The reversal of 21001311101222 is 22210111310012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21001311101213) and next prime (21001311101231).

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 21001311101222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32210599523 + ... + 32210600174.

It is an arithmetic number, because the mean of its divisors is an integer number (3961903781427).

Almost surely, 2^{21001311101222} is an apocalyptic number.

21001311101222 is a deficient number, since it is larger than the sum of its proper divisors (10693919150194).

21001311101222 is a wasteful number, since it uses less digits than its factorization.

21001311101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64421199862.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21001311101222 its reverse (22210111310012), we get a palindrome (43211422411234).

The spelling of 21001311101222 in words is "twenty-one trillion, one billion, three hundred eleven million, one hundred one thousand, two hundred twenty-two".