10212102222121 has 4 divisors (see below), whose sum is σ = 10227551696644. Its totient is φ = 10196652747600.

The previous prime is 10212102222103. The next prime is 10212102222131. The reversal of 10212102222121 is 12122220121201.

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 8754432346521 + 1457669875600 = 2958789^2 + 1207340^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212102222121 - 2¹⁵ = 10212102189353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212102222131) 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, 7724736270 + ... + 7724737591.

It is an arithmetic number, because the mean of its divisors is an integer number (2556887924161).

Almost surely, 2^{10212102222121} is an apocalyptic number.

It is an amenable number.

10212102222121 is a deficient number, since it is larger than the sum of its proper divisors (15449474523).

10212102222121 is an equidigital number, since it uses as much as digits as its factorization.

10212102222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449474522.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10212102222121 its reverse (12122220121201), we get a palindrome (22334322343322).

The spelling of 10212102222121 in words is "ten trillion, two hundred twelve billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".