21110331201 has 16 divisors (see below), whose sum is σ = 29995812864. Its totient is φ = 13175240144.

The previous prime is 21110331199. The next prime is 21110331217. The reversal of 21110331201 is 10213301112.

It is a happy number.

It is not a de Polignac number, because 21110331201 - 2¹ = 21110331199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110331251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3251511 + ... + 3257996.

It is an arithmetic number, because the mean of its divisors is an integer number (1874738304).

Almost surely, 2^21110331201 is an apocalyptic number.

It is an amenable number.

21110331201 is a deficient number, since it is larger than the sum of its proper divisors (8885481663).

21110331201 is a wasteful number, since it uses less digits than its factorization.

21110331201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509580.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21110331201 its reverse (10213301112), we get a palindrome (31323632313).

The spelling of 21110331201 in words is "twenty-one billion, one hundred ten million, three hundred thirty-one thousand, two hundred one".