21122110342 has 16 divisors (see below), whose sum is σ = 33518304000. Its totient is φ = 9954929160.

The previous prime is 21122110319. The next prime is 21122110379. The reversal of 21122110342 is 24301122112.

It is a super-2 number, since 2×21122110342² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 1389034 + ... + 1404157.

It is an arithmetic number, because the mean of its divisors is an integer number (2094894000).

Almost surely, 2^21122110342 is an apocalyptic number.

21122110342 is a deficient number, since it is larger than the sum of its proper divisors (12396193658).

21122110342 is a wasteful number, since it uses less digits than its factorization.

21122110342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793411.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21122110342 its reverse (24301122112), we get a palindrome (45423232454).

The spelling of 21122110342 in words is "twenty-one billion, one hundred twenty-two million, one hundred ten thousand, three hundred forty-two".