21201151311 has 36 divisors (see below), whose sum is σ = 32367260640. Its totient is φ = 13370832000.

The previous prime is 21201151271. The next prime is 21201151339. The reversal of 21201151311 is 11315110212.

21201151311 is a `hidden beast` number, since 2 + 1 + 201 + 151 + 311 = 666.

It is not a de Polignac number, because 21201151311 - 2¹⁸ = 21200889167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201151511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2435655 + ... + 2444343.

Almost surely, 2^21201151311 is an apocalyptic number.

21201151311 is a deficient number, since it is larger than the sum of its proper divisors (11166109329).

21201151311 is a wasteful number, since it uses less digits than its factorization.

21201151311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484 (or 9462 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 21201151311 its reverse (11315110212), we get a palindrome (32516261523).

The spelling of 21201151311 in words is "twenty-one billion, two hundred one million, one hundred fifty-one thousand, three hundred eleven".