21112319403923 has 16 divisors (see below), whose sum is σ = 23184240159744. Its totient is φ = 19066242140160.

The previous prime is 21112319403853. The next prime is 21112319404009. The reversal of 21112319403923 is 32930491321112.

It is a cyclic number.

It is not a de Polignac number, because 21112319403923 - 2¹⁶ = 21112319338387 is a prime.

It is a super-2 number, since 2×21112319403923² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112318403923) 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, 9137015 + ... + 11212032.

It is an arithmetic number, because the mean of its divisors is an integer number (1449015009984).

Almost surely, 2^{21112319403923} is an apocalyptic number.

21112319403923 is a deficient number, since it is larger than the sum of its proper divisors (2071920755821).

21112319403923 is a wasteful number, since it uses less digits than its factorization.

21112319403923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349682.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 21112319403923 in words is "twenty-one trillion, one hundred twelve billion, three hundred nineteen million, four hundred three thousand, nine hundred twenty-three".