2121100021222 has 64 divisors (see below), whose sum is σ = 3923700480000. Its totient is φ = 837441348480.

The previous prime is 2121100021207. The next prime is 2121100021241. The reversal of 2121100021222 is 2221200011212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2121100021196 and 2121100021205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 420934179 + ... + 420939217.

It is an arithmetic number, because the mean of its divisors is an integer number (61307820000).

Almost surely, 2^{2121100021222} is an apocalyptic number.

2121100021222 is a deficient number, since it is larger than the sum of its proper divisors (1802600458778).

2121100021222 is a wasteful number, since it uses less digits than its factorization.

2121100021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9221.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121100021222 its reverse (2221200011212), we get a palindrome (4342300032434).

The spelling of 2121100021222 in words is "two trillion, one hundred twenty-one billion, one hundred million, twenty-one thousand, two hundred twenty-two".