21113001342 has 24 divisors (see below), whose sum is σ = 45850989600. Its totient is φ = 7021335840.

The previous prime is 21113001337. The next prime is 21113001347. The reversal of 21113001342 is 24310031112.

21113001342 is a `hidden beast` number, since 21 + 1 + 1 + 300 + 1 + 342 = 666.

It is an interprime number because it is at equal distance from previous prime (21113001337) and next prime (21113001347).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113001347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1352967 + ... + 1368482.

It is an arithmetic number, because the mean of its divisors is an integer number (1910457900).

Almost surely, 2^21113001342 is an apocalyptic number.

21113001342 is an abundant number, since it is smaller than the sum of its proper divisors (24737988258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113001342 is a wasteful number, since it uses less digits than its factorization.

21113001342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721888 (or 2721885 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21113001342 its reverse (24310031112), we get a palindrome (45423032454).

The spelling of 21113001342 in words is "twenty-one billion, one hundred thirteen million, one thousand, three hundred forty-two".