10212121201101 has 4 divisors (see below), whose sum is σ = 13616161601472. Its totient is φ = 6808080800732.

The previous prime is 10212121201039. The next prime is 10212121201111. The reversal of 10212121201101 is 10110212121201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212121201101 is a prime.

It is a super-2 number, since 2×10212121201101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212121201111) 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, 1702020200181 + ... + 1702020200186.

It is an arithmetic number, because the mean of its divisors is an integer number (3404040400368).

Almost surely, 2^{10212121201101} is an apocalyptic number.

It is an amenable number.

10212121201101 is a deficient number, since it is larger than the sum of its proper divisors (3404040400371).

10212121201101 is an equidigital number, since it uses as much as digits as its factorization.

10212121201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404040400370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10212121201101 its reverse (10110212121201), we get a palindrome (20322333322302).

It can be divided in two parts, 10212121201 and 101, that multiplied together give a palindrome (1031424241301).

The spelling of 10212121201101 in words is "ten trillion, two hundred twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred one".