11021244121 has 4 divisors (see below), whose sum is σ = 11500428672. Its totient is φ = 10542059572.

The previous prime is 11021244107. The next prime is 11021244133. The reversal of 11021244121 is 12144212011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12144212011 = 35339 ⋅343649.

It is a cyclic number.

It is not a de Polignac number, because 11021244121 - 2³¹ = 8873760473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11021244181) 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, 239592241 + ... + 239592286.

It is an arithmetic number, because the mean of its divisors is an integer number (2875107168).

Almost surely, 2^11021244121 is an apocalyptic number.

It is an amenable number.

11021244121 is a deficient number, since it is larger than the sum of its proper divisors (479184551).

11021244121 is an equidigital number, since it uses as much as digits as its factorization.

11021244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479184550.

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

Adding to 11021244121 its reverse (12144212011), we get a palindrome (23165456132).

The spelling of 11021244121 in words is "eleven billion, twenty-one million, two hundred forty-four thousand, one hundred twenty-one".