21424201034143 has 4 divisors (see below), whose sum is σ = 21430027581480. Its totient is φ = 21418374486808.

The previous prime is 21424201034141. The next prime is 21424201034183. The reversal of 21424201034143 is 34143010242412.

It is a happy number.

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 21424201034143 - 2¹ = 21424201034141 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 (21424201034141) 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, 2913268153 + ... + 2913275506.

It is an arithmetic number, because the mean of its divisors is an integer number (5357506895370).

Almost surely, 2^{21424201034143} is an apocalyptic number.

21424201034143 is a deficient number, since it is larger than the sum of its proper divisors (5826547337).

21424201034143 is an equidigital number, since it uses as much as digits as its factorization.

21424201034143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826547336.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21424201034143 its reverse (34143010242412), we get a palindrome (55567211276555).

The spelling of 21424201034143 in words is "twenty-one trillion, four hundred twenty-four billion, two hundred one million, thirty-four thousand, one hundred forty-three".