21013142423122 has 8 divisors (see below), whose sum is σ = 31798649153916. Its totient is φ = 10413592705152.

The previous prime is 21013142423113. The next prime is 21013142423167. The reversal of 21013142423122 is 22132424131012.

It can be written as a sum of positive squares in 2 ways, for example, as 20838394178281 + 174748244841 = 4564909^2 + 418029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46489252923 + ... + 46489253374.

Almost surely, 2^{21013142423122} is an apocalyptic number.

21013142423122 is a deficient number, since it is larger than the sum of its proper divisors (10785506730794).

21013142423122 is a wasteful number, since it uses less digits than its factorization.

21013142423122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92978506412.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21013142423122 its reverse (22132424131012), we get a palindrome (43145566554134).

The spelling of 21013142423122 in words is "twenty-one trillion, thirteen billion, one hundred forty-two million, four hundred twenty-three thousand, one hundred twenty-two".