10212101210021 has 4 divisors (see below), whose sum is σ = 10225920021600. Its totient is φ = 10198282398444.

The previous prime is 10212101209979. The next prime is 10212101210023. The reversal of 10212101210021 is 12001210121201.

10212101210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-10212101210021 is a prime.

It is a super-2 number, since 2×10212101210021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212101209978 and 10212101210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212101210023) 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, 6909404681 + ... + 6909406158.

It is an arithmetic number, because the mean of its divisors is an integer number (2556480005400).

Almost surely, 2^{10212101210021} is an apocalyptic number.

It is an amenable number.

10212101210021 is a deficient number, since it is larger than the sum of its proper divisors (13818811579).

10212101210021 is an equidigital number, since it uses as much as digits as its factorization.

10212101210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818811578.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10212101210021 its reverse (12001210121201), we get a palindrome (22213311331222).

The spelling of 10212101210021 in words is "ten trillion, two hundred twelve billion, one hundred one million, two hundred ten thousand, twenty-one".