21050522135 has 8 divisors (see below), whose sum is σ = 25261736976. Its totient is φ = 16839677440.

The previous prime is 21050522113. The next prime is 21050522173. The reversal of 21050522135 is 53122505012.

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

It is not a de Polignac number, because 21050522135 - 2⁸ = 21050521879 is a prime.

It is a super-2 number, since 2×21050522135² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53552 + ... + 212058.

It is an arithmetic number, because the mean of its divisors is an integer number (3157717122).

Almost surely, 2^21050522135 is an apocalyptic number.

21050522135 is a deficient number, since it is larger than the sum of its proper divisors (4211214841).

21050522135 is a wasteful number, since it uses less digits than its factorization.

21050522135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185073.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 21050522135 in words is "twenty-one billion, fifty million, five hundred twenty-two thousand, one hundred thirty-five".