10212011222121 has 6 divisors (see below), whose sum is σ = 14750682876410. Its totient is φ = 6808007481408.

The previous prime is 10212011222059. The next prime is 10212011222159. The reversal of 10212011222121 is 12122211021201.

It can be written as a sum of positive squares in only one way, i.e., 8901361755225 + 1310649466896 = 2983515^2 + 1144836^2 .

It is not a de Polignac number, because 10212011222121 - 2⁹ = 10212011221609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212011222094 and 10212011222103.

It is not an unprimeable number, because it can be changed into a prime (10212011223121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567333956776 + ... + 567333956793.

Almost surely, 2^{10212011222121} is an apocalyptic number.

It is an amenable number.

10212011222121 is a deficient number, since it is larger than the sum of its proper divisors (4538671654289).

10212011222121 is a wasteful number, since it uses less digits than its factorization.

10212011222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134667913575 (or 1134667913572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10212011222121 its reverse (12122211021201), we get a palindrome (22334222243322).

The spelling of 10212011222121 in words is "ten trillion, two hundred twelve billion, eleven million, two hundred twenty-two thousand, one hundred twenty-one".