10101022121 has 4 divisors (see below), whose sum is σ = 10110801492. Its totient is φ = 10091242752.

The previous prime is 10101022111. The next prime is 10101022123. The reversal of 10101022121 is 12122010101.

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 9827946496 + 273075625 = 99136^2 + 16525^2 .

It is a cyclic number.

It is not a de Polignac number, because 10101022121 - 2¹⁴ = 10101005737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10101022123) 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, 4888136 + ... + 4890201.

It is an arithmetic number, because the mean of its divisors is an integer number (2527700373).

Almost surely, 2^10101022121 is an apocalyptic number.

It is an amenable number.

10101022121 is a deficient number, since it is larger than the sum of its proper divisors (9779371).

10101022121 is an equidigital number, since it uses as much as digits as its factorization.

10101022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9779370.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10101022121 its reverse (12122010101), we get a palindrome (22223032222).

The spelling of 10101022121 in words is "ten billion, one hundred one million, twenty-two thousand, one hundred twenty-one".