21345250141 has 4 divisors (see below), whose sum is σ = 21663836032. Its totient is φ = 21026664252.

The previous prime is 21345250139. The next prime is 21345250163. The reversal of 21345250141 is 14105254312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21345250141 - 2¹ = 21345250139 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 (21345350141) by changing a digit.

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, 159292845 + ... + 159292978.

It is an arithmetic number, because the mean of its divisors is an integer number (5415959008).

Almost surely, 2^21345250141 is an apocalyptic number.

It is an amenable number.

21345250141 is a deficient number, since it is larger than the sum of its proper divisors (318585891).

21345250141 is an equidigital number, since it uses as much as digits as its factorization.

21345250141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318585890.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 21345250141 in words is "twenty-one billion, three hundred forty-five million, two hundred fifty thousand, one hundred forty-one".