212101010102021 has 8 divisors (see below), whose sum is σ = 215089075111104. Its totient is φ = 209112965283040.

The previous prime is 212101010101991. The next prime is 212101010102027. The reversal of 212101010102021 is 120201010101212.

212101010102021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212101010102021 is a prime.

It is a super-2 number, since 2×212101010102021² (a number of 29 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 = 212101010101987 and 212101010102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101010102027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16770521 + ... + 26560353.

It is an arithmetic number, because the mean of its divisors is an integer number (26886134388888).

Almost surely, 2^{212101010102021} is an apocalyptic number.

It is an amenable number.

212101010102021 is a deficient number, since it is larger than the sum of its proper divisors (2988065009083).

212101010102021 is an equidigital number, since it uses as much as digits as its factorization.

212101010102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095051.

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

Adding to 212101010102021 its reverse (120201010101212), we get a palindrome (332302020203233).

The spelling of 212101010102021 in words is "two hundred twelve trillion, one hundred one billion, ten million, one hundred two thousand, twenty-one".