102211221211012 has 6 divisors (see below), whose sum is σ = 178869637119278. Its totient is φ = 51105610605504.

The previous prime is 102211221210991. The next prime is 102211221211013. The reversal of 102211221211012 is 210112122112201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79133727569796 + 23077493641216 = 8895714^2 + 4803904^2 .

It is not an unprimeable number, because it can be changed into a prime (102211221211013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776402651373 + ... + 12776402651380.

Almost surely, 2^{102211221211012} is an apocalyptic number.

It is an amenable number.

102211221211012 is a deficient number, since it is larger than the sum of its proper divisors (76658415908266).

102211221211012 is a wasteful number, since it uses less digits than its factorization.

102211221211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25552805302757 (or 25552805302755 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102211221211012 its reverse (210112122112201), we get a palindrome (312323343323213).

The spelling of 102211221211012 in words is "one hundred two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred eleven thousand, twelve".