10211121020101 has 4 divisors (see below), whose sum is σ = 10811775197772. Its totient is φ = 9610466842432.

The previous prime is 10211121020047. The next prime is 10211121020161. The reversal of 10211121020101 is 10102012111201.

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 5904462608100 + 4306658412001 = 2429910^2 + 2075249^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211121020101 - 2¹¹ = 10211121018053 is a prime.

It is a super-3 number, since 3×10211121020101³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211121020161) 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, 300327088810 + ... + 300327088843.

It is an arithmetic number, because the mean of its divisors is an integer number (2702943799443).

Almost surely, 2^{10211121020101} is an apocalyptic number.

It is an amenable number.

10211121020101 is a deficient number, since it is larger than the sum of its proper divisors (600654177671).

10211121020101 is an equidigital number, since it uses as much as digits as its factorization.

10211121020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600654177670.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10211121020101 its reverse (10102012111201), we get a palindrome (20313133131302).

The spelling of 10211121020101 in words is "ten trillion, two hundred eleven billion, one hundred twenty-one million, twenty thousand, one hundred one".