2121001220202 has 16 divisors (see below), whose sum is σ = 4242431607552. Its totient is φ = 706928878880.

The previous prime is 2121001220189. The next prime is 2121001220209. The reversal of 2121001220202 is 2020221001212.

It is not an unprimeable number, because it can be changed into a prime (2121001220209) 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, 17817699 + ... + 17936342.

It is an arithmetic number, because the mean of its divisors is an integer number (265151975472).

Almost surely, 2^{2121001220202} is an apocalyptic number.

2121001220202 is an abundant number, since it is smaller than the sum of its proper divisors (2121430387350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121001220202 is a wasteful number, since it uses less digits than its factorization.

2121001220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35763933.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121001220202 its reverse (2020221001212), we get a palindrome (4141222221414).

The spelling of 2121001220202 in words is "two trillion, one hundred twenty-one billion, one million, two hundred twenty thousand, two hundred two".