122012112211021 has 4 divisors (see below), whose sum is σ = 122012532334044. Its totient is φ = 122011692088000.

The previous prime is 122012112211013. The next prime is 122012112211111. The reversal of 122012112211021 is 120112211210221.

It is a happy number.

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 70089797961225 + 51922314249796 = 8371965^2 + 7205714^2 .

It is a cyclic number.

It is not a de Polignac number, because 122012112211021 - 2³ = 122012112211013 is a prime.

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 122012112211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122012112211921) 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, 209625580 + ... + 210206821.

It is an arithmetic number, because the mean of its divisors is an integer number (30503133083511).

Almost surely, 2^{122012112211021} is an apocalyptic number.

It is an amenable number.

122012112211021 is a deficient number, since it is larger than the sum of its proper divisors (420123023).

122012112211021 is an equidigital number, since it uses as much as digits as its factorization.

122012112211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420123022.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 122012112211021 its reverse (120112211210221), we get a palindrome (242124323421242).

The spelling of 122012112211021 in words is "one hundred twenty-two trillion, twelve billion, one hundred twelve million, two hundred eleven thousand, twenty-one".