872101212 has 48 divisors (see below), whose sum is σ = 2155114752. Its totient is φ = 273905280.

The previous prime is 872101193. The next prime is 872101213. The reversal of 872101212 is 212101278.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872101213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5089 + ... + 42072.

It is an arithmetic number, because the mean of its divisors is an integer number (44898224).

Almost surely, 2^872101212 is an apocalyptic number.

It is an amenable number.

872101212 is an abundant number, since it is smaller than the sum of its proper divisors (1283013540).

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

872101212 is a wasteful number, since it uses less digits than its factorization.

872101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47258 (or 47256 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 872101212 is about 29531.3598061451. The cubic root of 872101212 is about 955.4081977103.

The spelling of 872101212 in words is "eight hundred seventy-two million, one hundred one thousand, two hundred twelve".