1000012212109 has 4 divisors (see below), whose sum is σ = 1002582937980. Its totient is φ = 997441486240.

The previous prime is 1000012212097. The next prime is 1000012212139. The reversal of 1000012212109 is 9012122100001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 609133420900 + 390878791209 = 780470^2 + 625203^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000012212109 - 2⁵ = 1000012212077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000012212139) 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, 1285362352 + ... + 1285363129.

It is an arithmetic number, because the mean of its divisors is an integer number (250645734495).

Almost surely, 2^{1000012212109} is an apocalyptic number.

It is an amenable number.

1000012212109 is a deficient number, since it is larger than the sum of its proper divisors (2570725871).

1000012212109 is an equidigital number, since it uses as much as digits as its factorization.

1000012212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570725870.

The product of its (nonzero) digits is 72, while the sum is 19.

It can be divided in two parts, 1000012 and 212109, that added together give a palindrome (1212121).

The spelling of 1000012212109 in words is "one trillion, twelve million, two hundred twelve thousand, one hundred nine".