2012212009 has 8 divisors (see below), whose sum is σ = 2094861960. Its totient is φ = 1930446336.

The previous prime is 2012212001. The next prime is 2012212079. The reversal of 2012212009 is 9002122102.

It can be written as a sum of positive squares in 4 ways, for example, as 216825625 + 1795386384 = 14725^2 + 42372^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2012212009 - 2³ = 2012212001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012212001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216424 + ... + 225529.

It is an arithmetic number, because the mean of its divisors is an integer number (261857745).

Almost surely, 2^2012212009 is an apocalyptic number.

2012212009 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2012212009 is a deficient number, since it is larger than the sum of its proper divisors (82649951).

2012212009 is a wasteful number, since it uses less digits than its factorization.

2012212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442139.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2012212009 is about 44857.6861752810. The cubic root of 2012212009 is about 1262.4802093947.

It can be divided in two parts, 20122 and 12009, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 2012212009 in words is "two billion, twelve million, two hundred twelve thousand, nine".