21000122001213 has 32 divisors (see below), whose sum is σ = 30150987955200. Its totient is φ = 12952673876736.

The previous prime is 21000122001193. The next prime is 21000122001329. The reversal of 21000122001213 is 31210022100012.

It is not a de Polignac number, because 21000122001213 - 2⁵ = 21000122001181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000122001192 and 21000122001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000122001613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78892498 + ... + 79158236.

It is an arithmetic number, because the mean of its divisors is an integer number (942218373600).

Almost surely, 2^{21000122001213} is an apocalyptic number.

It is an amenable number.

21000122001213 is a deficient number, since it is larger than the sum of its proper divisors (9150865953987).

21000122001213 is a wasteful number, since it uses less digits than its factorization.

21000122001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292081.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21000122001213 its reverse (31210022100012), we get a palindrome (52210144101225).

The spelling of 21000122001213 in words is "twenty-one trillion, one hundred twenty-two million, one thousand, two hundred thirteen".