1102010001221 has 4 divisors (see below), whose sum is σ = 1102014885132. Its totient is φ = 1102005117312.

The previous prime is 1102010001203. The next prime is 1102010001251. The reversal of 1102010001221 is 1221000102011.

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 787636725121 + 314373276100 = 887489^2 + 560690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102010001221 - 2¹⁴ = 1102009984837 is a prime.

It is a super-2 number, since 2×1102010001221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102010001251) 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, 2086220 + ... + 2560533.

It is an arithmetic number, because the mean of its divisors is an integer number (275503721283).

Almost surely, 2^{1102010001221} is an apocalyptic number.

It is an amenable number.

1102010001221 is a deficient number, since it is larger than the sum of its proper divisors (4883911).

1102010001221 is an equidigital number, since it uses as much as digits as its factorization.

1102010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883910.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1102010001221 its reverse (1221000102011), we get a palindrome (2323010103232).

The spelling of 1102010001221 in words is "one trillion, one hundred two billion, ten million, one thousand, two hundred twenty-one".