21112022135 has 16 divisors (see below), whose sum is σ = 26945001216. Its totient is φ = 15824813568.

The previous prime is 21112022123. The next prime is 21112022143. The reversal of 21112022135 is 53122021112.

It is a cyclic number.

It is not a de Polignac number, because 21112022135 - 2¹⁰ = 21112021111 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 537944 + ... + 575853.

It is an arithmetic number, because the mean of its divisors is an integer number (1684062576).

Almost surely, 2^21112022135 is an apocalyptic number.

21112022135 is a deficient number, since it is larger than the sum of its proper divisors (5832979081).

21112022135 is a wasteful number, since it uses less digits than its factorization.

21112022135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114042.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21112022135 its reverse (53122021112), we get a palindrome (74234043247).

The spelling of 21112022135 in words is "twenty-one billion, one hundred twelve million, twenty-two thousand, one hundred thirty-five".