10012221212121 has 6 divisors (see below), whose sum is σ = 14462097306410. Its totient is φ = 6674814141408.

The previous prime is 10012221212111. The next prime is 10012221212263. The reversal of 10012221212121 is 12121212221001.

10012221212121 is a `hidden beast` number, since 100 + 12 + 221 + 212 + 121 = 666.

10012221212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8235958666896 + 1776262545225 = 2869836^2 + 1332765^2 .

It is not a de Polignac number, because 10012221212121 - 2⁶ = 10012221212057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10012221212094 and 10012221212103.

It is not an unprimeable number, because it can be changed into a prime (10012221212101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556234511776 + ... + 556234511793.

Almost surely, 2^{10012221212121} is an apocalyptic number.

It is an amenable number.

10012221212121 is a deficient number, since it is larger than the sum of its proper divisors (4449876094289).

10012221212121 is a wasteful number, since it uses less digits than its factorization.

10012221212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112469023575 (or 1112469023572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10012221212121 its reverse (12121212221001), we get a palindrome (22133433433122).

It can be divided in two parts, 100 and 12221212121, that added together give a palindrome (12221212221).

The spelling of 10012221212121 in words is "ten trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".