1111020221001 has 4 divisors (see below), whose sum is σ = 1481360294672. Its totient is φ = 740680147332.

The previous prime is 1111020220997. The next prime is 1111020221041. The reversal of 1111020221001 is 1001220201111.

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 not a de Polignac number, because 1111020221001 - 2² = 1111020220997 is a prime.

It is a super-2 number, since 2×1111020221001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111020221041) 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, 185170036831 + ... + 185170036836.

It is an arithmetic number, because the mean of its divisors is an integer number (370340073668).

Almost surely, 2^{1111020221001} is an apocalyptic number.

It is an amenable number.

1111020221001 is a deficient number, since it is larger than the sum of its proper divisors (370340073671).

1111020221001 is an equidigital number, since it uses as much as digits as its factorization.

1111020221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370340073670.

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

Adding to 1111020221001 its reverse (1001220201111), we get a palindrome (2112240422112).

The spelling of 1111020221001 in words is "one trillion, one hundred eleven billion, twenty million, two hundred twenty-one thousand, one".