20121111009973 has 8 divisors (see below), whose sum is σ = 20821702809600. Its totient is φ = 19420969902768.

The previous prime is 20121111009889. The next prime is 20121111009977. The reversal of 20121111009973 is 37990011112102.

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 20121111009973 - 2³⁷ = 19983672056501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121111009977) 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, 112582261 + ... + 112760842.

It is an arithmetic number, because the mean of its divisors is an integer number (2602712851200).

Almost surely, 2^{20121111009973} is an apocalyptic number.

It is an amenable number.

20121111009973 is a deficient number, since it is larger than the sum of its proper divisors (700591799627).

20121111009973 is a wasteful number, since it uses less digits than its factorization.

20121111009973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225346211.

The product of its (nonzero) digits is 6804, while the sum is 37.

The spelling of 20121111009973 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, nine thousand, nine hundred seventy-three".