10101212123 has 4 divisors (see below), whose sum is σ = 10141456248. Its totient is φ = 10060968000.

The previous prime is 10101212029. The next prime is 10101212131. The reversal of 10101212123 is 32121210101.

10101212123 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32121210101 = 31193 ⋅1029757.

It is a cyclic number.

It is not a de Polignac number, because 10101212123 - 2⁸ = 10101211867 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 = 10101212098 and 10101212107.

It is not an unprimeable number, because it can be changed into a prime (10101212153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20121686 + ... + 20122187.

It is an arithmetic number, because the mean of its divisors is an integer number (2535364062).

Almost surely, 2^10101212123 is an apocalyptic number.

10101212123 is a deficient number, since it is larger than the sum of its proper divisors (40244125).

10101212123 is an equidigital number, since it uses as much as digits as its factorization.

10101212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40244124.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10101212123 its reverse (32121210101), we get a palindrome (42222422224).

The spelling of 10101212123 in words is "ten billion, one hundred one million, two hundred twelve thousand, one hundred twenty-three".