10212212021 has 4 divisors (see below), whose sum is σ = 11140594944. Its totient is φ = 9283829100.

The previous prime is 10212212011. The next prime is 10212212033. The reversal of 10212212021 is 12021221201.

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 not a de Polignac number, because 10212212021 - 2⁶ = 10212211957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212211987 and 10212212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212212011) 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, 464191445 + ... + 464191466.

It is an arithmetic number, because the mean of its divisors is an integer number (2785148736).

Almost surely, 2^10212212021 is an apocalyptic number.

10212212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10212212021 is a deficient number, since it is larger than the sum of its proper divisors (928382923).

10212212021 is an equidigital number, since it uses as much as digits as its factorization.

10212212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928382922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10212212021 its reverse (12021221201), we get a palindrome (22233433222).

The spelling of 10212212021 in words is "ten billion, two hundred twelve million, two hundred twelve thousand, twenty-one".