21203341131 has 32 divisors (see below), whose sum is σ = 34013076480. Its totient is φ = 11486813184.

The previous prime is 21203341129. The next prime is 21203341141. The reversal of 21203341131 is 13114330212.

It is not a de Polignac number, because 21203341131 - 2¹ = 21203341129 is a prime.

It is a super-2 number, since 2×21203341131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21203341098 and 21203341107.

It is not an unprimeable number, because it can be changed into a prime (21203341141) 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, 139666 + ... + 248823.

It is an arithmetic number, because the mean of its divisors is an integer number (1062908640).

Almost surely, 2^21203341131 is an apocalyptic number.

21203341131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21203341131 is a deficient number, since it is larger than the sum of its proper divisors (12809735349).

21203341131 is a wasteful number, since it uses less digits than its factorization.

21203341131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388635.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21203341131 its reverse (13114330212), we get a palindrome (34317671343).

The spelling of 21203341131 in words is "twenty-one billion, two hundred three million, three hundred forty-one thousand, one hundred thirty-one".