2121221101123 has 8 divisors (see below), whose sum is σ = 2209736101760. Its totient is φ = 2033961632640.

The previous prime is 2121221101067. The next prime is 2121221101187. The reversal of 2121221101123 is 3211011221212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121221101123 - 2²¹ = 2121219003971 is a prime.

It is a super-2 number, since 2×2121221101123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121221101123.

It is not an unprimeable number, because it can be changed into a prime (2121221101723) 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, 313879590 + ... + 313886347.

It is an arithmetic number, because the mean of its divisors is an integer number (276217012720).

Almost surely, 2^{2121221101123} is an apocalyptic number.

2121221101123 is a deficient number, since it is larger than the sum of its proper divisors (88515000637).

2121221101123 is a wasteful number, since it uses less digits than its factorization.

2121221101123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627766077.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2121221101123 its reverse (3211011221212), we get a palindrome (5332232322335).

The spelling of 2121221101123 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, one hundred twenty-three".