21121340411043 has 12 divisors (see below), whose sum is σ = 30508737263160. Its totient is φ = 14080831554816.

The previous prime is 21121340411029. The next prime is 21121340411081. The reversal of 21121340411043 is 34011404312112.

It is a happy number.

21121340411043 is a `hidden beast` number, since 2 + 1 + 1 + 213 + 404 + 1 + 1 + 0 + 43 = 666.

It is not a de Polignac number, because 21121340411043 - 2⁴⁰ = 20021828783267 is a prime.

It is a super-2 number, since 2×21121340411043² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121340410998 and 21121340411016.

It is not an unprimeable number, because it can be changed into a prime (21121340431043) 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, 2965821 + ... + 7144142.

It is an arithmetic number, because the mean of its divisors is an integer number (2542394771930).

Almost surely, 2^{21121340411043} is an apocalyptic number.

21121340411043 is a deficient number, since it is larger than the sum of its proper divisors (9387396852117).

21121340411043 is a wasteful number, since it uses less digits than its factorization.

21121340411043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342098 (or 10342095 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21121340411043 its reverse (34011404312112), we get a palindrome (55132744723155).

The spelling of 21121340411043 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred forty million, four hundred eleven thousand, forty-three".