2120121222009 has 12 divisors (see below), whose sum is σ = 3288351283344. Its totient is φ = 1211497841064.

The previous prime is 2120121222007. The next prime is 2120121222029. The reversal of 2120121222009 is 9002221210212.

It is not a de Polignac number, because 2120121222009 - 2¹ = 2120121222007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120121222009.

It is not an unprimeable number, because it can be changed into a prime (2120121222001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7211296527 + ... + 7211296820.

It is an arithmetic number, because the mean of its divisors is an integer number (274029273612).

Almost surely, 2^{2120121222009} is an apocalyptic number.

It is an amenable number.

2120121222009 is a deficient number, since it is larger than the sum of its proper divisors (1168230061335).

2120121222009 is a wasteful number, since it uses less digits than its factorization.

2120121222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14422593364 (or 14422593357 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 2120121222009 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, nine".