10121001 has 16 divisors (see below), whose sum is σ = 15588288. Its totient is φ = 5772800.

The previous prime is 10120997. The next prime is 10121003. The reversal of 10121001 is 10012101.

It is not a de Polignac number, because 10121001 - 2² = 10120997 is a prime.

It is a super-2 number, since 2×10121001² = 204869322484002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8460 + ... + 9581.

It is an arithmetic number, because the mean of its divisors is an integer number (974268).

Almost surely, 2^10121001 is an apocalyptic number.

10121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10121001 is a deficient number, since it is larger than the sum of its proper divisors (5467287).

10121001 is a wasteful number, since it uses less digits than its factorization.

10121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18072.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 10121001 is about 3181.3520710541. The cubic root of 10121001 is about 216.3089500374.

Adding to 10121001 its reverse (10012101), we get a palindrome (20133102).

Subtracting from 10121001 its reverse (10012101), we obtain a square (108900 = 330²).

Multiplying 10121001 by its reverse (10012101), we get a palindrome (101332484233101).

It can be divided in two parts, 1012100 and 1, that added together give a palindrome (1012101).

The spelling of 10121001 in words is "ten million, one hundred twenty-one thousand, one".