10212210120121 has 4 divisors (see below), whose sum is σ = 10212242755572. Its totient is φ = 10212177484672.

The previous prime is 10212210120043. The next prime is 10212210120143. The reversal of 10212210120121 is 12102101221201.

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 4202750103721 + 6009460016400 = 2050061^2 + 2451420^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212210120121 - 2³⁵ = 10177850381753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212210120095 and 10212210120104.

It is not an unprimeable number, because it can be changed into a prime (10212210120221) 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, 15843760 + ... + 16475713.

It is an arithmetic number, because the mean of its divisors is an integer number (2553060688893).

Almost surely, 2^{10212210120121} is an apocalyptic number.

It is an amenable number.

10212210120121 is a deficient number, since it is larger than the sum of its proper divisors (32635451).

10212210120121 is an equidigital number, since it uses as much as digits as its factorization.

10212210120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32635450.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10212210120121 its reverse (12102101221201), we get a palindrome (22314311341322).

The spelling of 10212210120121 in words is "ten trillion, two hundred twelve billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".