1010121221121 has 4 divisors (see below), whose sum is σ = 1346828294832. Its totient is φ = 673414147412.

The previous prime is 1010121221113. The next prime is 1010121221177. The reversal of 1010121221121 is 1211221210101.

It is a happy number.

1010121221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1010121221121 - 2³ = 1010121221113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1010121221121.

It is not an unprimeable number, because it can be changed into a prime (1010121221101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168353536851 + ... + 168353536856.

It is an arithmetic number, because the mean of its divisors is an integer number (336707073708).

Almost surely, 2^{1010121221121} is an apocalyptic number.

It is an amenable number.

1010121221121 is a deficient number, since it is larger than the sum of its proper divisors (336707073711).

1010121221121 is an equidigital number, since it uses as much as digits as its factorization.

1010121221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336707073710.

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

Adding to 1010121221121 its reverse (1211221210101), we get a palindrome (2221342431222).

The spelling of 1010121221121 in words is "one trillion, ten billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".