21073068971149 has 8 divisors (see below), whose sum is σ = 22694184346680. Its totient is φ = 19451969319936.

The previous prime is 21073068971117. The next prime is 21073068971177. The reversal of 21073068971149 is 94117986037012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2911135502025 + 18161933469124 = 1706205^2 + 4261682^2 .

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 21073068971149 - 2⁵ = 21073068971117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21073068971093 and 21073068971102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073068971849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070572 + ... + 6579685.

It is an arithmetic number, because the mean of its divisors is an integer number (2836773043335).

Almost surely, 2^{21073068971149} is an apocalyptic number.

It is an amenable number.

21073068971149 is a deficient number, since it is larger than the sum of its proper divisors (1621115375531).

21073068971149 is a wasteful number, since it uses less digits than its factorization.

21073068971149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7862159.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 21073068971149 in words is "twenty-one trillion, seventy-three billion, sixty-eight million, nine hundred seventy-one thousand, one hundred forty-nine".