21383353131 has 16 divisors (see below), whose sum is σ = 33464811264. Its totient is φ = 11888813664.

The previous prime is 21383353127. The next prime is 21383353139. The reversal of 21383353131 is 13135338312.

It is not a de Polignac number, because 21383353131 - 2² = 21383353127 is a prime.

It is a super-2 number, since 2×21383353131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21383353092 and 21383353101.

It is not an unprimeable number, because it can be changed into a prime (21383353139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13759425 + ... + 13760978.

It is an arithmetic number, because the mean of its divisors is an integer number (2091550704).

Almost surely, 2^21383353131 is an apocalyptic number.

21383353131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21383353131 is a deficient number, since it is larger than the sum of its proper divisors (12081458133).

21383353131 is a wasteful number, since it uses less digits than its factorization.

21383353131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27520450.

The product of its digits is 19440, while the sum is 33.

The spelling of 21383353131 in words is "twenty-one billion, three hundred eighty-three million, three hundred fifty-three thousand, one hundred thirty-one".