11122321921 has 2 divisors, whose sum is σ = 11122321922. Its totient is φ = 11122321920.

The previous prime is 11122321879. The next prime is 11122321963. The reversal of 11122321921 is 12912322111.

It is a balanced prime because it is at equal distance from previous prime (11122321879) and next prime (11122321963).

It can be written as a sum of positive squares in only one way, i.e., 9093720321 + 2028601600 = 95361^2 + 45040^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122321921 - 2¹⁵ = 11122289153 is a prime.

It is a super-3 number, since 3×11122321921³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (11122321421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561160960 + 5561160961.

It is an arithmetic number, because the mean of its divisors is an integer number (5561160961).

Almost surely, 2^11122321921 is an apocalyptic number.

It is an amenable number.

11122321921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122321921 is an equidigital number, since it uses as much as digits as its factorization.

11122321921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The spelling of 11122321921 in words is "eleven billion, one hundred twenty-two million, three hundred twenty-one thousand, nine hundred twenty-one".