101121001 has 4 divisors (see below), whose sum is σ = 101165652. Its totient is φ = 101076352.

The previous prime is 101120989. The next prime is 101121011. The reversal of 101121001 is 100121101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100121101 = 443 ⋅226007.

It can be written as a sum of positive squares in 2 ways, for example, as 21483225 + 79637776 = 4635^2 + 8924^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121001 - 2²¹ = 99023849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101121011) 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, 18736 + ... + 23521.

It is an arithmetic number, because the mean of its divisors is an integer number (25291413).

Almost surely, 2^101121001 is an apocalyptic number.

It is an amenable number.

101121001 is a deficient number, since it is larger than the sum of its proper divisors (44651).

101121001 is an equidigital number, since it uses as much as digits as its factorization.

101121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44650.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 101121001 is about 10055.8938439106. The cubic root of 101121001 is about 465.8868510860.

Adding to 101121001 its reverse (100121101), we get a palindrome (201242102).

The spelling of 101121001 in words is "one hundred one million, one hundred twenty-one thousand, one".