122111233021 has 4 divisors (see below), whose sum is σ = 122253720732. Its totient is φ = 121968745312.

The previous prime is 122111233003. The next prime is 122111233063. The reversal of 122111233021 is 120332111221.

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 66429392121 + 55681840900 = 257739^2 + 235970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122111233021 is a prime.

It is a super-2 number, since 2×122111233021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122111233021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111233001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71242570 + ... + 71244283.

It is an arithmetic number, because the mean of its divisors is an integer number (30563430183).

Almost surely, 2^122111233021 is an apocalyptic number.

It is an amenable number.

122111233021 is a deficient number, since it is larger than the sum of its proper divisors (142487711).

122111233021 is an equidigital number, since it uses as much as digits as its factorization.

122111233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142487710.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 122111233021 its reverse (120332111221), we get a palindrome (242443344242).

The spelling of 122111233021 in words is "one hundred twenty-two billion, one hundred eleven million, two hundred thirty-three thousand, twenty-one".