10212210021221 has 16 divisors (see below), whose sum is σ = 11640553491840. Its totient is φ = 8881175741760.

The previous prime is 10212210021127. The next prime is 10212210021229. The reversal of 10212210021221 is 12212001221201.

10212210021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10212210021221 - 2¹⁴ = 10212210004837 is a prime.

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 10212210021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212210021229) 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, 114167945 + ... + 114257358.

It is an arithmetic number, because the mean of its divisors is an integer number (727534593240).

Almost surely, 2^{10212210021221} is an apocalyptic number.

It is an amenable number.

10212210021221 is a deficient number, since it is larger than the sum of its proper divisors (1428343470619).

10212210021221 is a wasteful number, since it uses less digits than its factorization.

10212210021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228425516.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10212210021221 its reverse (12212001221201), we get a palindrome (22424211242422).

The spelling of 10212210021221 in words is "ten trillion, two hundred twelve billion, two hundred ten million, twenty-one thousand, two hundred twenty-one".