1111002022021 has 8 divisors (see below), whose sum is σ = 1124610127704. Its totient is φ = 1097437885440.

The previous prime is 1111002022003. The next prime is 1111002022063. The reversal of 1111002022021 is 1202202001111.

It can be written as a sum of positive squares in 4 ways, for example, as 51852299521 + 1059149722500 = 227711^2 + 1029150^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111002022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111002021992 and 1111002022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111002022321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10941430 + ... + 11042503.

It is an arithmetic number, because the mean of its divisors is an integer number (140576265963).

Almost surely, 2^{1111002022021} is an apocalyptic number.

It is an amenable number.

1111002022021 is a deficient number, since it is larger than the sum of its proper divisors (13608105683).

1111002022021 is an equidigital number, since it uses as much as digits as its factorization.

1111002022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21984551.

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

Adding to 1111002022021 its reverse (1202202001111), we get a palindrome (2313204023132).

The spelling of 1111002022021 in words is "one trillion, one hundred eleven billion, two million, twenty-two thousand, twenty-one".