103121001 has 6 divisors (see below), whose sum is σ = 148952570. Its totient is φ = 68747328.

The previous prime is 103120981. The next prime is 103121023. The reversal of 103121001 is 100121301.

It can be written as a sum of positive squares in only one way, i.e., 102819600 + 301401 = 10140^2 + 549^2 .

It is not a de Polignac number, because 103121001 - 2⁷ = 103120873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11457889 = 103121001 / (1 + 0 + 3 + 1 + 2 + 1 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103121401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5728936 + ... + 5728953.

Almost surely, 2^103121001 is an apocalyptic number.

It is an amenable number.

103121001 is a deficient number, since it is larger than the sum of its proper divisors (45831569).

103121001 is a wasteful number, since it uses less digits than its factorization.

103121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11457895 (or 11457892 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 103121001 is about 10154.8511067371. The cubic root of 103121001 is about 468.9383021601.

Adding to 103121001 its reverse (100121301), we get a palindrome (203242302).

It can be divided in two parts, 103 and 121001, that added together give a square (121104 = 348²).

The spelling of 103121001 in words is "one hundred three million, one hundred twenty-one thousand, one".