101011221123 has 4 divisors (see below), whose sum is σ = 134681628168. Its totient is φ = 67340814080.

The previous prime is 101011221041. The next prime is 101011221127. The reversal of 101011221123 is 321122110101.

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 101011221123 - 2¹⁷ = 101011090051 is a prime.

It is a super-3 number, since 3×101011221123³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (101011221127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16835203518 + ... + 16835203523.

It is an arithmetic number, because the mean of its divisors is an integer number (33670407042).

Almost surely, 2^101011221123 is an apocalyptic number.

101011221123 is a deficient number, since it is larger than the sum of its proper divisors (33670407045).

101011221123 is an equidigital number, since it uses as much as digits as its factorization.

101011221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670407044.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 101011221123 its reverse (321122110101), we get a palindrome (422133331224).

The spelling of 101011221123 in words is "one hundred one billion, eleven million, two hundred twenty-one thousand, one hundred twenty-three".