21402323111 has 8 divisors (see below), whose sum is σ = 24404459184. Its totient is φ = 18593873280.

The previous prime is 21402323093. The next prime is 21402323161. The reversal of 21402323111 is 11132320412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21402323111 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 (21402323161) 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, 48421325 + ... + 48421766.

It is an arithmetic number, because the mean of its divisors is an integer number (3050557398).

Almost surely, 2^21402323111 is an apocalyptic number.

21402323111 is a deficient number, since it is larger than the sum of its proper divisors (3002136073).

21402323111 is a wasteful number, since it uses less digits than its factorization.

21402323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96843121.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21402323111 its reverse (11132320412), we get a palindrome (32534643523).

The spelling of 21402323111 in words is "twenty-one billion, four hundred two million, three hundred twenty-three thousand, one hundred eleven".