21213002000122 has 8 divisors (see below), whose sum is σ = 33691238470836. Its totient is φ = 9982589176512.

The previous prime is 21213002000051. The next prime is 21213002000123. The reversal of 21213002000122 is 22100020031212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18146654292321 + 3066347707801 = 4259889^2 + 1751099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21213002000096 and 21213002000105.

It is not an unprimeable number, because it can be changed into a prime (21213002000123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311955911733 + ... + 311955911800.

Almost surely, 2^{21213002000122} is an apocalyptic number.

21213002000122 is a deficient number, since it is larger than the sum of its proper divisors (12478236470714).

21213002000122 is a wasteful number, since it uses less digits than its factorization.

21213002000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623911823552.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21213002000122 its reverse (22100020031212), we get a palindrome (43313022031334).

The spelling of 21213002000122 in words is "twenty-one trillion, two hundred thirteen billion, two million, one hundred twenty-two", and thus it is an aban number.