121211010112123 has 8 divisors (see below), whose sum is σ = 123201511786080. Its totient is φ = 119220619274880.

The previous prime is 121211010112081. The next prime is 121211010112139. The reversal of 121211010112123 is 321211010112121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211010112123 is a prime.

It is a super-2 number, since 2×121211010112123² (a number of 29 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 121211010112123.

It is not an unprimeable number, because it can be changed into a prime (121211010112163) 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, 25502590 + ... + 29879827.

It is an arithmetic number, because the mean of its divisors is an integer number (15400188973260).

Almost surely, 2^{121211010112123} is an apocalyptic number.

121211010112123 is a deficient number, since it is larger than the sum of its proper divisors (1990501673957).

121211010112123 is an equidigital number, since it uses as much as digits as its factorization.

121211010112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55418357.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 121211010112123 its reverse (321211010112121), we get a palindrome (442422020224244).

The spelling of 121211010112123 in words is "one hundred twenty-one trillion, two hundred eleven billion, ten million, one hundred twelve thousand, one hundred twenty-three".