21011301213 has 8 divisors (see below), whose sum is σ = 32017220928. Its totient is φ = 12006457824.

The previous prime is 21011301163. The next prime is 21011301229. The reversal of 21011301213 is 31210311012.

It is a happy number.

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

It is not a de Polignac number, because 21011301213 - 2²² = 21007106909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21011301192 and 21011301201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011301713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500269056 + ... + 500269097.

It is an arithmetic number, because the mean of its divisors is an integer number (4002152616).

Almost surely, 2^21011301213 is an apocalyptic number.

It is an amenable number.

21011301213 is a deficient number, since it is larger than the sum of its proper divisors (11005919715).

21011301213 is a wasteful number, since it uses less digits than its factorization.

21011301213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000538163.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21011301213 its reverse (31210311012), we get a palindrome (52221612225).

The spelling of 21011301213 in words is "twenty-one billion, eleven million, three hundred one thousand, two hundred thirteen".