101521212 has 48 divisors (see below), whose sum is σ = 270117792. Its totient is φ = 29399040.

The previous prime is 101521193. The next prime is 101521213. The reversal of 101521212 is 212125101.

It is a junction number, because it is equal to n+sod(n) for n = 101521191 and 101521200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101521213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16489 + ... + 21792.

It is an arithmetic number, because the mean of its divisors is an integer number (5627454).

Almost surely, 2^101521212 is an apocalyptic number.

101521212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101521212 is an abundant number, since it is smaller than the sum of its proper divisors (168596580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101521212 is a wasteful number, since it uses less digits than its factorization.

101521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38318 (or 38316 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 101521212 is about 10075.7735186932. The cubic root of 101521212 is about 466.5006622705.

Adding to 101521212 its reverse (212125101), we get a palindrome (313646313).

The spelling of 101521212 in words is "one hundred one million, five hundred twenty-one thousand, two hundred twelve".