121222020001 has 4 divisors (see below), whose sum is σ = 121225290004. Its totient is φ = 121218750000.

The previous prime is 121222019981. The next prime is 121222020077. The reversal of 121222020001 is 100020222121.

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 24040192401 + 97181827600 = 155049^2 + 311740^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222020001 - 2²³ = 121213631393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578750 + ... + 1653751.

It is an arithmetic number, because the mean of its divisors is an integer number (30306322501).

Almost surely, 2^121222020001 is an apocalyptic number.

It is an amenable number.

121222020001 is a deficient number, since it is larger than the sum of its proper divisors (3270003).

121222020001 is an equidigital number, since it uses as much as digits as its factorization.

121222020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270002.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121222020001 its reverse (100020222121), we get a palindrome (221242242122).

The spelling of 121222020001 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty thousand, one".