12210121123 has 16 divisors (see below), whose sum is σ = 13014682560. Its totient is φ = 11415398400.

The previous prime is 12210121081. The next prime is 12210121139. The reversal of 12210121123 is 32112101221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12210121123 is a prime.

It is a super-2 number, since 2×12210121123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210121097 and 12210121106.

It is not an unprimeable number, because it can be changed into a prime (12210121163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1721298 + ... + 1728376.

It is an arithmetic number, because the mean of its divisors is an integer number (813417660).

Almost surely, 2^12210121123 is an apocalyptic number.

12210121123 is a deficient number, since it is larger than the sum of its proper divisors (804561437).

12210121123 is a wasteful number, since it uses less digits than its factorization.

12210121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7758.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12210121123 its reverse (32112101221), we get a palindrome (44322222344).

The spelling of 12210121123 in words is "twelve billion, two hundred ten million, one hundred twenty-one thousand, one hundred twenty-three".