10101211011121 has 4 divisors (see below), whose sum is σ = 10239583764772. Its totient is φ = 9962838257472.

The previous prime is 10101211011107. The next prime is 10101211011139. The reversal of 10101211011121 is 12111011210101.

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 2281715986225 + 7819495024896 = 1510535^2 + 2796336^2 .

It is a cyclic number.

It is not a de Polignac number, because 10101211011121 - 2¹⁹ = 10101210486833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10101211011721) 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, 69186376716 + ... + 69186376861.

It is an arithmetic number, because the mean of its divisors is an integer number (2559895941193).

Almost surely, 2^{10101211011121} is an apocalyptic number.

It is an amenable number.

10101211011121 is a deficient number, since it is larger than the sum of its proper divisors (138372753651).

10101211011121 is an equidigital number, since it uses as much as digits as its factorization.

10101211011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138372753650.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 10101211011121 its reverse (12111011210101), we get a palindrome (22212222221222).

The spelling of 10101211011121 in words is "ten trillion, one hundred one billion, two hundred eleven million, eleven thousand, one hundred twenty-one".