11023220213021 has 4 divisors (see below), whose sum is σ = 11671644931452. Its totient is φ = 10374795494592.

The previous prime is 11023220212999. The next prime is 11023220213023. The reversal of 11023220213021 is 12031202232011.

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 3786958812121 + 7236261400900 = 1946011^2 + 2690030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11023220213021 is a prime.

It is a super-2 number, since 2×11023220213021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11023220212984 and 11023220213002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11023220213023) 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, 324212359190 + ... + 324212359223.

It is an arithmetic number, because the mean of its divisors is an integer number (2917911232863).

Almost surely, 2^{11023220213021} is an apocalyptic number.

It is an amenable number.

11023220213021 is a deficient number, since it is larger than the sum of its proper divisors (648424718431).

11023220213021 is an equidigital number, since it uses as much as digits as its factorization.

11023220213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648424718430.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11023220213021 its reverse (12031202232011), we get a palindrome (23054422445032).

The spelling of 11023220213021 in words is "eleven trillion, twenty-three billion, two hundred twenty million, two hundred thirteen thousand, twenty-one".