101020111121 has 4 divisors (see below), whose sum is σ = 101170215972. Its totient is φ = 100870006272.

The previous prime is 101020111097. The next prime is 101020111123. The reversal of 101020111121 is 121111020101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121111020101 = 17 ⋅7124177653.

It can be written as a sum of positive squares in 2 ways, for example, as 20570730625 + 80449380496 = 143425^2 + 283636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101020111121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101020111123) 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, 75051416 + ... + 75052761.

It is an arithmetic number, because the mean of its divisors is an integer number (25292553993).

Almost surely, 2^101020111121 is an apocalyptic number.

It is an amenable number.

101020111121 is a deficient number, since it is larger than the sum of its proper divisors (150104851).

101020111121 is an equidigital number, since it uses as much as digits as its factorization.

101020111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150104850.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 101020111121 its reverse (121111020101), we get a palindrome (222131131222).

The spelling of 101020111121 in words is "one hundred one billion, twenty million, one hundred eleven thousand, one hundred twenty-one".