21010422043 has 8 divisors (see below), whose sum is σ = 23957585568. Its totient is φ = 18253398144.

The previous prime is 21010422029. The next prime is 21010422109. The reversal of 21010422043 is 34022401012.

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

It is a cyclic number.

It is not a de Polignac number, because 21010422043 - 2³³ = 12420487451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010422043.

It is not an unprimeable number, because it can be changed into a prime (21010422343) 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, 47534671 + ... + 47535112.

It is an arithmetic number, because the mean of its divisors is an integer number (2994698196).

Almost surely, 2^21010422043 is an apocalyptic number.

21010422043 is a deficient number, since it is larger than the sum of its proper divisors (2947163525).

21010422043 is a wasteful number, since it uses less digits than its factorization.

21010422043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95069813.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21010422043 its reverse (34022401012), we get a palindrome (55032823055).

The spelling of 21010422043 in words is "twenty-one billion, ten million, four hundred twenty-two thousand, forty-three".