2121200021146 has 8 divisors (see below), whose sum is σ = 3184264636704. Its totient is φ = 1059778475580.

The previous prime is 2121200021089. The next prime is 2121200021147. The reversal of 2121200021146 is 6411200021212.

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

It is not an unprimeable number, because it can be changed into a prime (2121200021147) 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, 410764270 + ... + 410769433.

It is an arithmetic number, because the mean of its divisors is an integer number (398033079588).

Almost surely, 2^{2121200021146} is an apocalyptic number.

2121200021146 is a deficient number, since it is larger than the sum of its proper divisors (1063064615558).

2121200021146 is a wasteful number, since it uses less digits than its factorization.

2121200021146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821534996.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 2121200021146 its reverse (6411200021212), we get a palindrome (8532400042358).

The spelling of 2121200021146 in words is "two trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, one hundred forty-six".