101211021123 has 4 divisors (see below), whose sum is σ = 134948028168. Its totient is φ = 67474014080.

The previous prime is 101211021103. The next prime is 101211021151. The reversal of 101211021123 is 321120112101.

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 101211021123 - 2³⁶ = 32491544387 is a prime.

It is a super-2 number, since 2×101211021123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101211021103) 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, 16868503518 + ... + 16868503523.

It is an arithmetic number, because the mean of its divisors is an integer number (33737007042).

Almost surely, 2^101211021123 is an apocalyptic number.

101211021123 is a deficient number, since it is larger than the sum of its proper divisors (33737007045).

101211021123 is an equidigital number, since it uses as much as digits as its factorization.

101211021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33737007044.

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

Adding to 101211021123 its reverse (321120112101), we get a palindrome (422331133224).

The spelling of 101211021123 in words is "one hundred one billion, two hundred eleven million, twenty-one thousand, one hundred twenty-three".