21110001212331 has 32 divisors (see below), whose sum is σ = 31301699066880. Its totient is φ = 14060906183808.

The previous prime is 21110001212299. The next prime is 21110001212401. The reversal of 21110001212331 is 13321210001112.

21110001212331 is a `hidden beast` number, since 21 + 1 + 100 + 0 + 1 + 212 + 331 = 666.

It is not a de Polignac number, because 21110001212331 - 2⁵ = 21110001212299 is a prime.

It is a super-2 number, since 2×21110001212331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110001212831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370017250 + ... + 370074296.

It is an arithmetic number, because the mean of its divisors is an integer number (978178095840).

Almost surely, 2^{21110001212331} is an apocalyptic number.

21110001212331 is a deficient number, since it is larger than the sum of its proper divisors (10191697854549).

21110001212331 is a wasteful number, since it uses less digits than its factorization.

21110001212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68920 (or 68914 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21110001212331 its reverse (13321210001112), we get a palindrome (34431211213443).

The spelling of 21110001212331 in words is "twenty-one trillion, one hundred ten billion, one million, two hundred twelve thousand, three hundred thirty-one".