101031121 has 4 divisors (see below), whose sum is σ = 101164644. Its totient is φ = 100897600.

The previous prime is 101031107. The next prime is 101031131. The reversal of 101031121 is 121130101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 82446400 = 4311^2 + 9080^2 .

It is a cyclic number.

It is not a de Polignac number, because 101031121 - 2¹¹ = 101029073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101031098 and 101031107.

It is not an unprimeable number, because it can be changed into a prime (101031131) 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, 65620 + ... + 67141.

It is an arithmetic number, because the mean of its divisors is an integer number (25291161).

Almost surely, 2^101031121 is an apocalyptic number.

It is an amenable number.

101031121 is a deficient number, since it is larger than the sum of its proper divisors (133523).

101031121 is an equidigital number, since it uses as much as digits as its factorization.

101031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133522.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 101031121 is about 10051.4238294880. The cubic root of 101031121 is about 465.7487778133.

Adding to 101031121 its reverse (121130101), we get a palindrome (222161222).

It can be divided in two parts, 1010 and 31121, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 101031121 in words is "one hundred one million, thirty-one thousand, one hundred twenty-one".