21341042120 has 16 divisors (see below), whose sum is σ = 48017344860. Its totient is φ = 8536416832.

The previous prime is 21341042119. The next prime is 21341042137. The reversal of 21341042120 is 2124014312.

It can be written as a sum of positive squares in 2 ways, for example, as 20125961956 + 1215080164 = 141866^2 + 34858^2 .

It is a super-2 number, since 2×21341042120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21341042092 and 21341042101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266762987 + ... + 266763066.

Almost surely, 2^21341042120 is an apocalyptic number.

21341042120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21341042120 is an abundant number, since it is smaller than the sum of its proper divisors (26676302740).

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

21341042120 is a wasteful number, since it uses less digits than its factorization.

21341042120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533526064 (or 533526060 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21341042120 its reverse (2124014312), we get a palindrome (23465056432).

The spelling of 21341042120 in words is "twenty-one billion, three hundred forty-one million, forty-two thousand, one hundred twenty".