12210210101021 has 4 divisors (see below), whose sum is σ = 12213812999100. Its totient is φ = 12206607202944.

The previous prime is 12210210101003. The next prime is 12210210101027. The reversal of 12210210101021 is 12010101201221.

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 9978206968900 + 2232003132121 = 3158830^2 + 1493989^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210210101021 - 2¹⁴ = 12210210084637 is a prime.

It is a super-2 number, since 2×12210210101021² (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 = 12210210100987 and 12210210101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210210101027) 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, 1801443956 + ... + 1801450733.

It is an arithmetic number, because the mean of its divisors is an integer number (3053453249775).

Almost surely, 2^{12210210101021} is an apocalyptic number.

It is an amenable number.

12210210101021 is a deficient number, since it is larger than the sum of its proper divisors (3602898079).

12210210101021 is an equidigital number, since it uses as much as digits as its factorization.

12210210101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602898078.

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

Adding to 12210210101021 its reverse (12010101201221), we get a palindrome (24220311302242).

The spelling of 12210210101021 in words is "twelve trillion, two hundred ten billion, two hundred ten million, one hundred one thousand, twenty-one".