21220123300013 has 16 divisors (see below), whose sum is σ = 23436564681024. Its totient is φ = 19053001349760.

The previous prime is 21220123300009. The next prime is 21220123300027. The reversal of 21220123300013 is 31000332102212.

It is a cyclic number.

It is not a de Polignac number, because 21220123300013 - 2² = 21220123300009 is a prime.

It is a super-2 number, since 2×21220123300013² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220123300073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35441795 + ... + 36035552.

It is an arithmetic number, because the mean of its divisors is an integer number (1464785292564).

Almost surely, 2^{21220123300013} is an apocalyptic number.

It is an amenable number.

21220123300013 is a deficient number, since it is larger than the sum of its proper divisors (2216441381011).

21220123300013 is a wasteful number, since it uses less digits than its factorization.

21220123300013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71477692.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21220123300013 its reverse (31000332102212), we get a palindrome (52220455402225).

The spelling of 21220123300013 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-three million, three hundred thousand, thirteen".