1021223111101 has 4 divisors (see below), whose sum is σ = 1021532482204. Its totient is φ = 1020913740000.

The previous prime is 1021223111099. The next prime is 1021223111149. The reversal of 1021223111101 is 1011113221201.

It is a happy number.

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 565881567001 + 455341544100 = 752251^2 + 674790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021223111101 - 2¹ = 1021223111099 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 (1021223211101) 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, 154680600 + ... + 154687201.

It is an arithmetic number, because the mean of its divisors is an integer number (255383120551).

Almost surely, 2^{1021223111101} is an apocalyptic number.

It is an amenable number.

1021223111101 is a deficient number, since it is larger than the sum of its proper divisors (309371103).

1021223111101 is an equidigital number, since it uses as much as digits as its factorization.

1021223111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309371102.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1021223111101 its reverse (1011113221201), we get a palindrome (2032336332302).

The spelling of 1021223111101 in words is "one trillion, twenty-one billion, two hundred twenty-three million, one hundred eleven thousand, one hundred one".