2121122121123 has 8 divisors (see below), whose sum is σ = 2828202642000. Its totient is φ = 1414061507168.

The previous prime is 2121122121101. The next prime is 2121122121179. The reversal of 2121122121123 is 3211212211212.

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 2121122121123 - 2⁶ = 2121122121059 is a prime.

It is a super-2 number, since 2×2121122121123² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121122121123.

It is not an unprimeable number, because it can be changed into a prime (2121122121023) 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, 4726308 + ... + 5155601.

It is an arithmetic number, because the mean of its divisors is an integer number (353525330250).

Almost surely, 2^{2121122121123} is an apocalyptic number.

2121122121123 is a deficient number, since it is larger than the sum of its proper divisors (707080520877).

2121122121123 is an equidigital number, since it uses as much as digits as its factorization.

2121122121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953461.

The product of its digits is 192, while the sum is 21.

Adding to 2121122121123 its reverse (3211212211212), we get a palindrome (5332334332335).

The spelling of 2121122121123 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-three".