21121116373 has 8 divisors (see below), whose sum is σ = 24186411648. Its totient is φ = 18067819344.

The previous prime is 21121116343. The next prime is 21121116397. The reversal of 21121116373 is 37361112112.

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 21121116373 - 2¹³ = 21121108181 is a prime.

It is a super-2 number, since 2×21121116373² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121116343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995786 + ... + 3002827.

It is an arithmetic number, because the mean of its divisors is an integer number (3023301456).

Almost surely, 2^21121116373 is an apocalyptic number.

It is an amenable number.

21121116373 is a deficient number, since it is larger than the sum of its proper divisors (3065295275).

21121116373 is an equidigital number, since it uses as much as digits as its factorization.

21121116373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999123.

The product of its digits is 1512, while the sum is 28.

Adding to 21121116373 its reverse (37361112112), we get a palindrome (58482228485).

The spelling of 21121116373 in words is "twenty-one billion, one hundred twenty-one million, one hundred sixteen thousand, three hundred seventy-three".