10121011212221 has 36 divisors (see below), whose sum is σ = 12964815072000. Its totient is φ = 7872106683168.

The previous prime is 10121011212163. The next prime is 10121011212233. The reversal of 10121011212221 is 12221211012101.

It is not a de Polignac number, because 10121011212221 - 2¹⁴ = 10121011195837 is a prime.

It is a super-3 number, since 3×10121011212221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10121011212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121019212221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9869021 + ... + 10846178.

It is an arithmetic number, because the mean of its divisors is an integer number (360133752000).

Almost surely, 2^{10121011212221} is an apocalyptic number.

It is an amenable number.

10121011212221 is a deficient number, since it is larger than the sum of its proper divisors (2843803859779).

10121011212221 is a wasteful number, since it uses less digits than its factorization.

10121011212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20715298 (or 20715278 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10121011212221 its reverse (12221211012101), we get a palindrome (22342222224322).

The spelling of 10121011212221 in words is "ten trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, two hundred twenty-one".