102123312212 has 6 divisors (see below), whose sum is σ = 178715796378. Its totient is φ = 51061656104.

The previous prime is 102123312209. The next prime is 102123312217. The reversal of 102123312212 is 212213321201.

It can be written as a sum of positive squares in only one way, i.e., 72578515216 + 29544796996 = 269404^2 + 171886^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123312217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765414023 + ... + 12765414030.

It is an arithmetic number, because the mean of its divisors is an integer number (29785966063).

Almost surely, 2^102123312212 is an apocalyptic number.

It is an amenable number.

102123312212 is a deficient number, since it is larger than the sum of its proper divisors (76592484166).

102123312212 is a wasteful number, since it uses less digits than its factorization.

102123312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25530828057 (or 25530828055 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 102123312212 its reverse (212213321201), we get a palindrome (314336633413).

The spelling of 102123312212 in words is "one hundred two billion, one hundred twenty-three million, three hundred twelve thousand, two hundred twelve".