21031211330132 has 6 divisors (see below), whose sum is σ = 36804619827738. Its totient is φ = 10515605665064.

The previous prime is 21031211330083. The next prime is 21031211330137. The reversal of 21031211330132 is 23103311213012.

It can be written as a sum of positive squares in only one way, i.e., 16532892716356 + 4498318613776 = 4066066^2 + 2120924^2 .

It is a super-2 number, since 2×21031211330132² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21031211330098 and 21031211330107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031211330137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628901416263 + ... + 2628901416270.

It is an arithmetic number, because the mean of its divisors is an integer number (6134103304623).

Almost surely, 2^{21031211330132} is an apocalyptic number.

It is an amenable number.

21031211330132 is a deficient number, since it is larger than the sum of its proper divisors (15773408497606).

21031211330132 is a wasteful number, since it uses less digits than its factorization.

21031211330132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257802832537 (or 5257802832535 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21031211330132 its reverse (23103311213012), we get a palindrome (44134522543144).

The spelling of 21031211330132 in words is "twenty-one trillion, thirty-one billion, two hundred eleven million, three hundred thirty thousand, one hundred thirty-two".