1012121101123 has 4 divisors (see below), whose sum is σ = 1104132110328. Its totient is φ = 920110091920.

The previous prime is 1012121101063. The next prime is 1012121101127. The reversal of 1012121101123 is 3211011212101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012121101123 - 2⁹ = 1012121100611 is a prime.

It is a super-2 number, since 2×1012121101123² (a number of 25 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 = 1012121101097 and 1012121101106.

It is not an unprimeable number, because it can be changed into a prime (1012121101127) 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, 46005504586 + ... + 46005504607.

It is an arithmetic number, because the mean of its divisors is an integer number (276033027582).

Almost surely, 2^{1012121101123} is an apocalyptic number.

1012121101123 is a deficient number, since it is larger than the sum of its proper divisors (92011009205).

1012121101123 is an equidigital number, since it uses as much as digits as its factorization.

1012121101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92011009204.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1012121101123 its reverse (3211011212101), we get a palindrome (4223132313224).

The spelling of 1012121101123 in words is "one trillion, twelve billion, one hundred twenty-one million, one hundred one thousand, one hundred twenty-three".