221146020023 has 4 divisors (see below), whose sum is σ = 221146962168. Its totient is φ = 221145077880.

The previous prime is 221146020019. The next prime is 221146020049. The reversal of 221146020023 is 320020641122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221146020023 - 2² = 221146020019 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 (221146023023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194108 + ... + 692798.

It is an arithmetic number, because the mean of its divisors is an integer number (55286740542).

Almost surely, 2^221146020023 is an apocalyptic number.

221146020023 is a deficient number, since it is larger than the sum of its proper divisors (942145).

221146020023 is an equidigital number, since it uses as much as digits as its factorization.

221146020023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942144.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221146020023 its reverse (320020641122), we get a palindrome (541166661145).

The spelling of 221146020023 in words is "two hundred twenty-one billion, one hundred forty-six million, twenty thousand, twenty-three".