869991021110212 has 12 divisors (see below), whose sum is σ = 1522485255566716. Its totient is φ = 434995233805440.

The previous prime is 869991021110153. The next prime is 869991021110213. The reversal of 869991021110212 is 212011120199968.

It can be written as a sum of positive squares in 2 ways, for example, as 332918924476356 + 537072096633856 = 18246066^2 + 23174816^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 869991021110212.

It is not an unprimeable number, because it can be changed into a prime (869991021110213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62032089 + ... + 74752672.

Almost surely, 2^{869991021110212} is an apocalyptic number.

It is an amenable number.

869991021110212 is a deficient number, since it is larger than the sum of its proper divisors (652494234456504).

869991021110212 is a wasteful number, since it uses less digits than its factorization.

869991021110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138374838 (or 138374836 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 52.

The spelling of 869991021110212 in words is "eight hundred sixty-nine trillion, nine hundred ninety-one billion, twenty-one million, one hundred ten thousand, two hundred twelve".