10212010121 has 4 divisors (see below), whose sum is σ = 10232312832. Its totient is φ = 10191707412.

The previous prime is 10212010099. The next prime is 10212010153. The reversal of 10212010121 is 12101021201.

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 10212010121 - 2⁶ = 10212010057 is a prime.

It is a super-2 number, since 2×10212010121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212010021) 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, 10150601 + ... + 10151606.

It is an arithmetic number, because the mean of its divisors is an integer number (2558078208).

Almost surely, 2^10212010121 is an apocalyptic number.

It is an amenable number.

10212010121 is a deficient number, since it is larger than the sum of its proper divisors (20302711).

10212010121 is an equidigital number, since it uses as much as digits as its factorization.

10212010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20302710.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10212010121 its reverse (12101021201), we get a palindrome (22313031322).

The spelling of 10212010121 in words is "ten billion, two hundred twelve million, ten thousand, one hundred twenty-one".