1101022001221 has 4 divisors (see below), whose sum is σ = 1101033319500. Its totient is φ = 1101010682944.

The previous prime is 1101022001143. The next prime is 1101022001251. The reversal of 1101022001221 is 1221002201011.

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 189686380900 + 911335620321 = 435530^2 + 954639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101022001221 - 2³³ = 1092432066629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101022001251) 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, 5511946 + ... + 5708203.

It is an arithmetic number, because the mean of its divisors is an integer number (275258329875).

Almost surely, 2^{1101022001221} is an apocalyptic number.

It is an amenable number.

1101022001221 is a deficient number, since it is larger than the sum of its proper divisors (11318279).

1101022001221 is an equidigital number, since it uses as much as digits as its factorization.

1101022001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11318278.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1101022001221 its reverse (1221002201011), we get a palindrome (2322024202232).

The spelling of 1101022001221 in words is "one trillion, one hundred one billion, twenty-two million, one thousand, two hundred twenty-one".