10121212123 has 16 divisors (see below), whose sum is σ = 12199113216. Its totient is φ = 8283341440.

The previous prime is 10121212099. The next prime is 10121212139. The reversal of 10121212123 is 32121212101.

10121212123 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 10121212123 - 2¹³ = 10121203931 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121212097 and 10121212106.

It is not an unprimeable number, because it can be changed into a prime (10121215123) 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, 1172311 + ... + 1180912.

It is an arithmetic number, because the mean of its divisors is an integer number (762444576).

Almost surely, 2^10121212123 is an apocalyptic number.

10121212123 is a deficient number, since it is larger than the sum of its proper divisors (2077901093).

10121212123 is a wasteful number, since it uses less digits than its factorization.

10121212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353274.

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

Adding to 10121212123 its reverse (32121212101), we get a palindrome (42242424224).

The spelling of 10121212123 in words is "ten billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-three".