1002101011221 has 4 divisors (see below), whose sum is σ = 1336134681632. Its totient is φ = 668067340812.

The previous prime is 1002101011213. The next prime is 1002101011229. The reversal of 1002101011221 is 1221101012001.

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 an interprime number because it is at equal distance from previous prime (1002101011213) and next prime (1002101011229).

It is not a de Polignac number, because 1002101011221 - 2³ = 1002101011213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002101011197 and 1002101011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002101011229) 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, 167016835201 + ... + 167016835206.

It is an arithmetic number, because the mean of its divisors is an integer number (334033670408).

Almost surely, 2^{1002101011221} is an apocalyptic number.

It is an amenable number.

1002101011221 is a deficient number, since it is larger than the sum of its proper divisors (334033670411).

1002101011221 is an equidigital number, since it uses as much as digits as its factorization.

1002101011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334033670410.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1002101011221 its reverse (1221101012001), we get a palindrome (2223202023222).

The spelling of 1002101011221 in words is "one trillion, two billion, one hundred one million, eleven thousand, two hundred twenty-one".