20116121464321 has 4 divisors (see below), whose sum is σ = 20120995740672. Its totient is φ = 20111247187972.

The previous prime is 20116121464267. The next prime is 20116121464333. The reversal of 20116121464321 is 12346412161102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20116121464321 - 2¹³ = 20116121456129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116121468321) 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, 2437131985 + ... + 2437140238.

It is an arithmetic number, because the mean of its divisors is an integer number (5030248935168).

Almost surely, 2^{20116121464321} is an apocalyptic number.

It is an amenable number.

20116121464321 is a deficient number, since it is larger than the sum of its proper divisors (4874276351).

20116121464321 is an equidigital number, since it uses as much as digits as its factorization.

20116121464321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874276350.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 20116121464321 in words is "twenty trillion, one hundred sixteen billion, one hundred twenty-one million, four hundred sixty-four thousand, three hundred twenty-one".