102131333243444 has 6 divisors (see below), whose sum is σ = 178729833176034. Its totient is φ = 51065666621720.

The previous prime is 102131333243431. The next prime is 102131333243477. The reversal of 102131333243444 is 444342333131201.

It can be written as a sum of positive squares in only one way, i.e., 76658114833444 + 25473218410000 = 8755462^2 + 5047100^2 .

It is a super-2 number, since 2×102131333243444² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102131333243398 and 102131333243407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766416655427 + ... + 12766416655434.

It is an arithmetic number, because the mean of its divisors is an integer number (29788305529339).

Almost surely, 2^{102131333243444} is an apocalyptic number.

It is an amenable number.

102131333243444 is a deficient number, since it is larger than the sum of its proper divisors (76598499932590).

102131333243444 is a wasteful number, since it uses less digits than its factorization.

102131333243444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25532833310865 (or 25532833310863 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 38.

Adding to 102131333243444 its reverse (444342333131201), we get a palindrome (546473666374645).

The spelling of 102131333243444 in words is "one hundred two trillion, one hundred thirty-one billion, three hundred thirty-three million, two hundred forty-three thousand, four hundred forty-four".