10112121001221 has 8 divisors (see below), whose sum is σ = 13488176217984. Its totient is φ = 6738739892640.

The previous prime is 10112121001139. The next prime is 10112121001247. The reversal of 10112121001221 is 12210012121101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10112121001221 - 2⁷ = 10112121001093 is a prime.

It is a super-2 number, since 2×10112121001221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10112121001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112121081221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668518221 + ... + 668533346.

It is an arithmetic number, because the mean of its divisors is an integer number (1686022027248).

Almost surely, 2^{10112121001221} is an apocalyptic number.

It is an amenable number.

10112121001221 is a deficient number, since it is larger than the sum of its proper divisors (3376055216763).

10112121001221 is a wasteful number, since it uses less digits than its factorization.

10112121001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337054091.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10112121001221 its reverse (12210012121101), we get a palindrome (22322133122322).

The spelling of 10112121001221 in words is "ten trillion, one hundred twelve billion, one hundred twenty-one million, one thousand, two hundred twenty-one".