11020222212121 has 4 divisors (see below), whose sum is σ = 11059440085044. Its totient is φ = 10981004339200.

The previous prime is 11020222212079. The next prime is 11020222212151. The reversal of 11020222212121 is 12121222202011.

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 4156660586521 + 6863561625600 = 2038789^2 + 2619840^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020222212121 - 2¹⁹ = 11020221687833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020222212151) 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, 19608936040 + ... + 19608936601.

It is an arithmetic number, because the mean of its divisors is an integer number (2764860021261).

Almost surely, 2^{11020222212121} is an apocalyptic number.

It is an amenable number.

11020222212121 is a deficient number, since it is larger than the sum of its proper divisors (39217872923).

11020222212121 is an equidigital number, since it uses as much as digits as its factorization.

11020222212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39217872922.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11020222212121 its reverse (12121222202011), we get a palindrome (23141444414132).

The spelling of 11020222212121 in words is "eleven trillion, twenty billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".