10212221111121 has 40 divisors (see below), whose sum is σ = 15961245094080. Its totient is φ = 6494681733408.

The previous prime is 10212221111101. The next prime is 10212221111143. The reversal of 10212221111121 is 12111112221201.

It is a happy number.

10212221111121 is a `hidden beast` number, since 1 + 0 + 212 + 221 + 111 + 121 = 666.

It is not a de Polignac number, because 10212221111121 - 2⁵ = 10212221111089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10212221111094 and 10212221111103.

It is not an unprimeable number, because it can be changed into a prime (10212221111101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6653091 + ... + 8042888.

It is an arithmetic number, because the mean of its divisors is an integer number (399031127352).

Almost surely, 2^{10212221111121} is an apocalyptic number.

It is an amenable number.

10212221111121 is a deficient number, since it is larger than the sum of its proper divisors (5749023982959).

10212221111121 is a wasteful number, since it uses less digits than its factorization.

10212221111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14696387 (or 14696378 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 10212221111121 its reverse (12111112221201), we get a palindrome (22323333332322).

The spelling of 10212221111121 in words is "ten trillion, two hundred twelve billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".