2121202011009 has 16 divisors (see below), whose sum is σ = 2910163961664. Its totient is φ = 1373715720000.

The previous prime is 2121202010927. The next prime is 2121202011043. The reversal of 2121202011009 is 9001102021212.

It is not a de Polignac number, because 2121202011009 - 2¹⁹ = 2121201486721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121202012009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66027967 + ... + 66060084.

It is an arithmetic number, because the mean of its divisors is an integer number (181885247604).

Almost surely, 2^{2121202011009} is an apocalyptic number.

It is an amenable number.

2121202011009 is a deficient number, since it is larger than the sum of its proper divisors (788961950655).

2121202011009 is a wasteful number, since it uses less digits than its factorization.

2121202011009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132088208.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 2121202011009 in words is "two trillion, one hundred twenty-one billion, two hundred two million, eleven thousand, nine".