10211010121 has 4 divisors (see below), whose sum is σ = 10996472452. Its totient is φ = 9425547792.

The previous prime is 10211010097. The next prime is 10211010137. The reversal of 10211010121 is 12101011201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12101011201 = 1019 ⋅11875379.

It can be written as a sum of positive squares in 2 ways, for example, as 6609690000 + 3601320121 = 81300^2 + 60011^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211010121 - 2⁷ = 10211009993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211010098 and 10211010107.

It is not an unprimeable number, because it can be changed into a prime (10211010151) 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, 392731146 + ... + 392731171.

It is an arithmetic number, because the mean of its divisors is an integer number (2749118113).

Almost surely, 2^10211010121 is an apocalyptic number.

It is an amenable number.

10211010121 is a deficient number, since it is larger than the sum of its proper divisors (785462331).

10211010121 is an equidigital number, since it uses as much as digits as its factorization.

10211010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785462330.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10211010121 its reverse (12101011201), we get a palindrome (22312021322).

The spelling of 10211010121 in words is "ten billion, two hundred eleven million, ten thousand, one hundred twenty-one".