21142101331 has 16 divisors (see below), whose sum is σ = 23766865920. Its totient is φ = 18660581280.

The previous prime is 21142101319. The next prime is 21142101349. The reversal of 21142101331 is 13310124112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21142101331 is a prime.

It is a super-2 number, since 2×21142101331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21142101299 and 21142101308.

It is not an unprimeable number, because it can be changed into a prime (21142101311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 943030 + ... + 965188.

It is an arithmetic number, because the mean of its divisors is an integer number (1485429120).

Almost surely, 2^21142101331 is an apocalyptic number.

21142101331 is a deficient number, since it is larger than the sum of its proper divisors (2624764589).

21142101331 is a wasteful number, since it uses less digits than its factorization.

21142101331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25386.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21142101331 its reverse (13310124112), we get a palindrome (34452225443).

The spelling of 21142101331 in words is "twenty-one billion, one hundred forty-two million, one hundred one thousand, three hundred thirty-one".