101211521212 has 12 divisors (see below), whose sum is σ = 177127723080. Its totient is φ = 50603600336.

The previous prime is 101211521207. The next prime is 101211521221. The reversal of 101211521212 is 212125112101.

It is a self number, because there is not a number n which added to its sum of digits gives 101211521212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432262 + ... + 623917.

It is an arithmetic number, because the mean of its divisors is an integer number (14760643590).

Almost surely, 2^101211521212 is an apocalyptic number.

It is an amenable number.

101211521212 is a deficient number, since it is larger than the sum of its proper divisors (75916201868).

101211521212 is a wasteful number, since it uses less digits than its factorization.

101211521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080140 (or 1080138 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 101211521212 its reverse (212125112101), we get a palindrome (313336633313).

The spelling of 101211521212 in words is "one hundred one billion, two hundred eleven million, five hundred twenty-one thousand, two hundred twelve".