23121101220143 has 4 divisors (see below), whose sum is σ = 24126366490608. Its totient is φ = 22115835949680.

The previous prime is 23121101220109. The next prime is 23121101220163. The reversal of 23121101220143 is 34102210112132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23121101220143 - 2²² = 23121097025839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1005265270441 = 23121101220143 / (2 + 3 + 1 + 2 + 1 + 1 + 0 + 1 + 2 + 2 + 0 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121101220103) 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, 502632635198 + ... + 502632635243.

It is an arithmetic number, because the mean of its divisors is an integer number (6031591622652).

Almost surely, 2^{23121101220143} is an apocalyptic number.

23121101220143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

23121101220143 is a deficient number, since it is larger than the sum of its proper divisors (1005265270465).

23121101220143 is a wasteful number, since it uses less digits than its factorization.

23121101220143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005265270464.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 23121101220143 its reverse (34102210112132), we get a palindrome (57223311332275).

The spelling of 23121101220143 in words is "twenty-three trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred forty-three".