21123201030311 has 8 divisors (see below), whose sum is σ = 21177403728000. Its totient is φ = 21069045820152.

The previous prime is 21123201030307. The next prime is 21123201030329. The reversal of 21123201030311 is 11303010232112.

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 21123201030311 - 2² = 21123201030307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123201030011) 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, 10981025 + ... + 12760458.

It is an arithmetic number, because the mean of its divisors is an integer number (2647175466000).

Almost surely, 2^{21123201030311} is an apocalyptic number.

21123201030311 is a deficient number, since it is larger than the sum of its proper divisors (54202697689).

21123201030311 is a wasteful number, since it uses less digits than its factorization.

21123201030311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23743765.

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

Adding to 21123201030311 its reverse (11303010232112), we get a palindrome (32426211262423).

The spelling of 21123201030311 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred one million, thirty thousand, three hundred eleven".