11020123021 has 2 divisors, whose sum is σ = 11020123022. Its totient is φ = 11020123020.

The previous prime is 11020123003. The next prime is 11020123043. The reversal of 11020123021 is 12032102011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10667997796 + 352125225 = 103286^2 + 18765^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020123021 - 2¹³ = 11020114829 is a prime.

It is a super-2 number, since 2×11020123021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11020122992 and 11020123010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11020123321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510061510 + 5510061511.

It is an arithmetic number, because the mean of its divisors is an integer number (5510061511).

Almost surely, 2^11020123021 is an apocalyptic number.

It is an amenable number.

11020123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020123021 is an equidigital number, since it uses as much as digits as its factorization.

11020123021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11020123021 its reverse (12032102011), we get a palindrome (23052225032).

The spelling of 11020123021 in words is "eleven billion, twenty million, one hundred twenty-three thousand, twenty-one".