21131210122323 has 16 divisors (see below), whose sum is σ = 32203721949696. Its totient is φ = 12073558694400.

The previous prime is 21131210122307. The next prime is 21131210122339. The reversal of 21131210122323 is 32322101213112.

It is an interprime number because it is at equal distance from previous prime (21131210122307) and next prime (21131210122339).

It is not a de Polignac number, because 21131210122323 - 2⁴ = 21131210122307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21131210122293 and 21131210122302.

It is not an unprimeable number, because it can be changed into a prime (21131210122303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58921903 + ... + 59279448.

It is an arithmetic number, because the mean of its divisors is an integer number (2012732621856).

Almost surely, 2^{21131210122323} is an apocalyptic number.

21131210122323 is a deficient number, since it is larger than the sum of its proper divisors (11072511827373).

21131210122323 is a wasteful number, since it uses less digits than its factorization.

21131210122323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118209874.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21131210122323 its reverse (32322101213112), we get a palindrome (53453311335435).

The spelling of 21131210122323 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred ten million, one hundred twenty-two thousand, three hundred twenty-three".