21411120042 has 48 divisors (see below), whose sum is σ = 51521849280. Its totient is φ = 6588034128.

The previous prime is 21411120019. The next prime is 21411120091. The reversal of 21411120042 is 24002111412.

It is a super-2 number, since 2×21411120042² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 21411119997 and 21411120024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1163958 + ... + 1182209.

It is an arithmetic number, because the mean of its divisors is an integer number (1073371860).

Almost surely, 2^21411120042 is an apocalyptic number.

21411120042 is an abundant number, since it is smaller than the sum of its proper divisors (30110729238).

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

21411120042 is a wasteful number, since it uses less digits than its factorization.

21411120042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346204 (or 2346185 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21411120042 its reverse (24002111412), we get a palindrome (45413231454).

The spelling of 21411120042 in words is "twenty-one billion, four hundred eleven million, one hundred twenty thousand, forty-two".