21202124343 has 8 divisors (see below), whose sum is σ = 28274049408. Its totient is φ = 14132474424.

The previous prime is 21202124329. The next prime is 21202124357. The reversal of 21202124343 is 34342120212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21202124329) and next prime (21202124357).

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

It is not a de Polignac number, because 21202124343 - 2⁴ = 21202124327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202124143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546921 + ... + 584402.

It is an arithmetic number, because the mean of its divisors is an integer number (3534256176).

Almost surely, 2^21202124343 is an apocalyptic number.

21202124343 is a deficient number, since it is larger than the sum of its proper divisors (7071925065).

21202124343 is a wasteful number, since it uses less digits than its factorization.

21202124343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137573.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21202124343 its reverse (34342120212), we get a palindrome (55544244555).

The spelling of 21202124343 in words is "twenty-one billion, two hundred two million, one hundred twenty-four thousand, three hundred forty-three".