122020122220021 has 4 divisors (see below), whose sum is σ = 123139572882700. Its totient is φ = 120900671557344.

The previous prime is 122020122220019. The next prime is 122020122220043. The reversal of 122020122220021 is 120022221020221.

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 83006494424100 + 39013627795921 = 9110790^2 + 6246089^2 .

It is a cyclic number.

It is not a de Polignac number, because 122020122220021 - 2¹ = 122020122220019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122020122320021) 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, 559725331176 + ... + 559725331393.

It is an arithmetic number, because the mean of its divisors is an integer number (30784893220675).

Almost surely, 2^{122020122220021} is an apocalyptic number.

It is an amenable number.

122020122220021 is a deficient number, since it is larger than the sum of its proper divisors (1119450662679).

122020122220021 is a wasteful number, since it uses less digits than its factorization.

122020122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119450662678.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122020122220021 its reverse (120022221020221), we get a palindrome (242042343240242).

The spelling of 122020122220021 in words is "one hundred twenty-two trillion, twenty billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".