21210100232311 has 4 divisors (see below), whose sum is σ = 21211317891400. Its totient is φ = 21208882573224.

The previous prime is 21210100232303. The next prime is 21210100232341. The reversal of 21210100232311 is 11323200101212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21210100232311 - 2³ = 21210100232303 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 (21210100232341) 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, 608803416 + ... + 608838253.

It is an arithmetic number, because the mean of its divisors is an integer number (5302829472850).

Almost surely, 2^{21210100232311} is an apocalyptic number.

21210100232311 is a deficient number, since it is larger than the sum of its proper divisors (1217659089).

21210100232311 is a wasteful number, since it uses less digits than its factorization.

21210100232311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217659088.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21210100232311 its reverse (11323200101212), we get a palindrome (32533300333523).

The spelling of 21210100232311 in words is "twenty-one trillion, two hundred ten billion, one hundred million, two hundred thirty-two thousand, three hundred eleven".