121211022123 has 6 divisors (see below), whose sum is σ = 175082587524. Its totient is φ = 80807348076.

The previous prime is 121211022089. The next prime is 121211022167. The reversal of 121211022123 is 321220112121.

It is not a de Polignac number, because 121211022123 - 2¹⁴ = 121211005739 is a prime.

It is a super-2 number, since 2×121211022123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121211022096 and 121211022105.

It is not an unprimeable number, because it can be changed into a prime (121211029123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6733945665 + ... + 6733945682.

It is an arithmetic number, because the mean of its divisors is an integer number (29180431254).

Almost surely, 2^121211022123 is an apocalyptic number.

121211022123 is a deficient number, since it is larger than the sum of its proper divisors (53871565401).

121211022123 is a wasteful number, since it uses less digits than its factorization.

121211022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13467891353 (or 13467891350 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121211022123 its reverse (321220112121), we get a palindrome (442431134244).

The spelling of 121211022123 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred twenty-three".