10212211221121 has 16 divisors (see below), whose sum is σ = 13115348193024. Its totient is φ = 7728687324864.

The previous prime is 10212211221061. The next prime is 10212211221133. The reversal of 10212211221121 is 12112211221201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10212211221121 - 2²⁹ = 10211674350209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10212211221151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2439608806 + ... + 2439612991.

It is an arithmetic number, because the mean of its divisors is an integer number (819709262064).

Almost surely, 2^{10212211221121} is an apocalyptic number.

It is an amenable number.

10212211221121 is a deficient number, since it is larger than the sum of its proper divisors (2903136971903).

10212211221121 is a wasteful number, since it uses less digits than its factorization.

10212211221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4879221840.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 10212211221121 its reverse (12112211221201), we get a palindrome (22324422442322).

The spelling of 10212211221121 in words is "ten trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".