102121122212 has 12 divisors (see below), whose sum is σ = 189224432460. Its totient is φ = 48056998656.

The previous prime is 102121122209. The next prime is 102121122223. The reversal of 102121122212 is 212221121201.

It can be written as a sum of positive squares in 2 ways, for example, as 75677809216 + 26443312996 = 275096^2 + 162614^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750890537 + ... + 750890672.

It is an arithmetic number, because the mean of its divisors is an integer number (15768702705).

Almost surely, 2^102121122212 is an apocalyptic number.

It is an amenable number.

102121122212 is a deficient number, since it is larger than the sum of its proper divisors (87103310248).

102121122212 is a wasteful number, since it uses less digits than its factorization.

102121122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501781230 (or 1501781228 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102121122212 its reverse (212221121201), we get a palindrome (314342243413).

The spelling of 102121122212 in words is "one hundred two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".