1042101012221 has 4 divisors (see below), whose sum is σ = 1042135244700. Its totient is φ = 1042066779744.

The previous prime is 1042101012151. The next prime is 1042101012241. The reversal of 1042101012221 is 1222101012401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 462502005625 + 579599006596 = 680075^2 + 761314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042101012221 - 2¹⁰ = 1042101011197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1042101012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042101012241) 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, 17070536 + ... + 17131473.

It is an arithmetic number, because the mean of its divisors is an integer number (260533811175).

Almost surely, 2^{1042101012221} is an apocalyptic number.

It is an amenable number.

1042101012221 is a deficient number, since it is larger than the sum of its proper divisors (34232479).

1042101012221 is an equidigital number, since it uses as much as digits as its factorization.

1042101012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34232478.

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

Adding to 1042101012221 its reverse (1222101012401), we get a palindrome (2264202024622).

The spelling of 1042101012221 in words is "one trillion, forty-two billion, one hundred one million, twelve thousand, two hundred twenty-one".