10012121210101 has 4 divisors (see below), whose sum is σ = 10357366769100. Its totient is φ = 9666875651104.

The previous prime is 10012121210093. The next prime is 10012121210183. The reversal of 10012121210101 is 10101212121001.

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 1901643758001 + 8110477452100 = 1379001^2 + 2847890^2 .

It is a cyclic number.

It is not a de Polignac number, because 10012121210101 - 2³ = 10012121210093 is a prime.

It is a super-2 number, since 2×10012121210101² (a number of 27 digits) contains 22 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 (10012121210701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172622779456 + ... + 172622779513.

It is an arithmetic number, because the mean of its divisors is an integer number (2589341692275).

Almost surely, 2^{10012121210101} is an apocalyptic number.

It is an amenable number.

10012121210101 is a deficient number, since it is larger than the sum of its proper divisors (345245558999).

10012121210101 is an equidigital number, since it uses as much as digits as its factorization.

10012121210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345245558998.

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

Adding to 10012121210101 its reverse (10101212121001), we get a palindrome (20113333331102).

The spelling of 10012121210101 in words is "ten trillion, twelve billion, one hundred twenty-one million, two hundred ten thousand, one hundred one".