21133234139973 has 4 divisors (see below), whose sum is σ = 28177645519968. Its totient is φ = 14088822759980.

The previous prime is 21133234139959. The next prime is 21133234139987. The reversal of 21133234139973 is 37993143233112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21133234139959) and next prime (21133234139987).

It is a cyclic number.

It is not a de Polignac number, because 21133234139973 - 2¹⁰ = 21133234138949 is a prime.

It is a super-2 number, since 2×21133234139973² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133234139573) 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, 3522205689993 + ... + 3522205689998.

It is an arithmetic number, because the mean of its divisors is an integer number (7044411379992).

Almost surely, 2^{21133234139973} is an apocalyptic number.

It is an amenable number.

21133234139973 is a deficient number, since it is larger than the sum of its proper divisors (7044411379995).

21133234139973 is an equidigital number, since it uses as much as digits as its factorization.

21133234139973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044411379994.

The product of its digits is 2204496, while the sum is 51.

The spelling of 21133234139973 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred thirty-four million, one hundred thirty-nine thousand, nine hundred seventy-three".