1021111102205 has 8 divisors (see below), whose sum is σ = 1225350516312. Its totient is φ = 816877419328.

The previous prime is 1021111102189. The next prime is 1021111102373. The reversal of 1021111102205 is 5022011111201.

It can be written as a sum of positive squares in 4 ways, for example, as 336424360441 + 684686741764 = 580021^2 + 827458^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1021111102205 - 2⁴ = 1021111102189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1030574 + ... + 1761903.

It is an arithmetic number, because the mean of its divisors is an integer number (153168814539).

Almost surely, 2^{1021111102205} is an apocalyptic number.

It is an amenable number.

1021111102205 is a deficient number, since it is larger than the sum of its proper divisors (204239414107).

1021111102205 is an equidigital number, since it uses as much as digits as its factorization.

1021111102205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865615.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 1021111102205 its reverse (5022011111201), we get a palindrome (6043122213406).

The spelling of 1021111102205 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred two thousand, two hundred five".