10201000121 has 16 divisors (see below), whose sum is σ = 11259068688. Its totient is φ = 9182208000.

The previous prime is 10201000109. The next prime is 10201000129. The reversal of 10201000121 is 12100010201.

It can be written as a sum of positive squares in 8 ways, for example, as 12924025 + 10188076096 = 3595^2 + 100936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10201000121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10201000099 and 10201000108.

It is not an unprimeable number, because it can be changed into a prime (10201000129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1668971 + ... + 1675071.

It is an arithmetic number, because the mean of its divisors is an integer number (703691793).

Almost surely, 2^10201000121 is an apocalyptic number.

It is an amenable number.

10201000121 is a deficient number, since it is larger than the sum of its proper divisors (1058068567).

10201000121 is a wasteful number, since it uses less digits than its factorization.

10201000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9292.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10201000121 its reverse (12100010201), we get a palindrome (22301010322).

The spelling of 10201000121 in words is "ten billion, two hundred one million, one hundred twenty-one", and thus it is an aban number.