21152350413011 has 4 divisors (see below), whose sum is σ = 21153719424024. Its totient is φ = 21150981402000.

The previous prime is 21152350413001. The next prime is 21152350413071. The reversal of 21152350413011 is 11031405325112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21152350413011 is a prime.

It is a super-3 number, since 3×21152350413011³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152350413001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684482330 + ... + 684513231.

It is an arithmetic number, because the mean of its divisors is an integer number (5288429856006).

Almost surely, 2^{21152350413011} is an apocalyptic number.

21152350413011 is a deficient number, since it is larger than the sum of its proper divisors (1369011013).

21152350413011 is a wasteful number, since it uses less digits than its factorization.

21152350413011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369011012.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 21152350413011 its reverse (11031405325112), we get a palindrome (32183755738123).

The spelling of 21152350413011 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty million, four hundred thirteen thousand, eleven".