2121222122099 has 4 divisors (see below), whose sum is σ = 2121262538136. Its totient is φ = 2121181706064.

The previous prime is 2121222122053. The next prime is 2121222122137. The reversal of 2121222122099 is 9902212221212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2121222122099 - 2³⁶ = 2052502645363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121222322099) 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, 20129189 + ... + 20234294.

It is an arithmetic number, because the mean of its divisors is an integer number (530315634534).

Almost surely, 2^{2121222122099} is an apocalyptic number.

2121222122099 is a deficient number, since it is larger than the sum of its proper divisors (40416037).

2121222122099 is an equidigital number, since it uses as much as digits as its factorization.

2121222122099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40416036.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 2121222122099 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, ninety-nine".