121012442101 has 4 divisors (see below), whose sum is σ = 121055100012. Its totient is φ = 120969784192.

The previous prime is 121012442087. The next prime is 121012442107. The reversal of 121012442101 is 101244210121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101244210121 = 137 ⋅739008833.

It can be written as a sum of positive squares in 2 ways, for example, as 37564254225 + 83448187876 = 193815^2 + 288874^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012442101 - 2¹¹ = 121012440053 is a prime.

It is a super-2 number, since 2×121012442101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012442107) 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, 21324700 + ... + 21330373.

It is an arithmetic number, because the mean of its divisors is an integer number (30263775003).

Almost surely, 2^121012442101 is an apocalyptic number.

It is an amenable number.

121012442101 is a deficient number, since it is larger than the sum of its proper divisors (42657911).

121012442101 is an equidigital number, since it uses as much as digits as its factorization.

121012442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42657910.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121012442101 its reverse (101244210121), we get a palindrome (222256652222).

The spelling of 121012442101 in words is "one hundred twenty-one billion, twelve million, four hundred forty-two thousand, one hundred one".