21011213001233 has 8 divisors (see below), whose sum is σ = 25859954463168. Its totient is φ = 16624256440464.

The previous prime is 21011213001179. The next prime is 21011213001241. The reversal of 21011213001233 is 33210031211012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21011213001233 - 2²⁰ = 21011211952657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011213004233) 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, 115446225191 + ... + 115446225372.

It is an arithmetic number, because the mean of its divisors is an integer number (3232494307896).

Almost surely, 2^{21011213001233} is an apocalyptic number.

It is an amenable number.

21011213001233 is a deficient number, since it is larger than the sum of its proper divisors (4848741461935).

21011213001233 is a wasteful number, since it uses less digits than its factorization.

21011213001233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230892450583.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21011213001233 its reverse (33210031211012), we get a palindrome (54221244212245).

The spelling of 21011213001233 in words is "twenty-one trillion, eleven billion, two hundred thirteen million, one thousand, two hundred thirty-three".