10121011001 has 4 divisors (see below), whose sum is σ = 10121261172. Its totient is φ = 10120760832.

The previous prime is 10121010983. The next prime is 10121011009. The reversal of 10121011001 is 10011012101.

It is a happy number.

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 8408706601 + 1712304400 = 91699^2 + 41380^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121011001 - 2⁶ = 10121010937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10121011001.

It is not an unprimeable number, because it can be changed into a prime (10121011009) 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, 48956 + ... + 150461.

It is an arithmetic number, because the mean of its divisors is an integer number (2530315293).

Almost surely, 2^10121011001 is an apocalyptic number.

It is an amenable number.

10121011001 is a deficient number, since it is larger than the sum of its proper divisors (250171).

10121011001 is an equidigital number, since it uses as much as digits as its factorization.

10121011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250170.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 10121011001 its reverse (10011012101), we get a palindrome (20132023102).

It can be divided in two parts, 1012101 and 1001, that multiplied together give a palindrome (1013113101).

The spelling of 10121011001 in words is "ten billion, one hundred twenty-one million, eleven thousand, one".