20122210121 has 4 divisors (see below), whose sum is σ = 21670072452. Its totient is φ = 18574347792.

The previous prime is 20122210109. The next prime is 20122210183. The reversal of 20122210121 is 12101222102.

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 7986103225 + 12136106896 = 89365^2 + 110164^2 .

It is not a de Polignac number, because 20122210121 - 2⁶ = 20122210057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122210096 and 20122210105.

It is not an unprimeable number, because it can be changed into a prime (20122210621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773931146 + ... + 773931171.

It is an arithmetic number, because the mean of its divisors is an integer number (5417518113).

Almost surely, 2^20122210121 is an apocalyptic number.

It is an amenable number.

20122210121 is a deficient number, since it is larger than the sum of its proper divisors (1547862331).

20122210121 is a wasteful number, since it uses less digits than its factorization.

20122210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547862330.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20122210121 its reverse (12101222102), we get a palindrome (32223432223).

The spelling of 20122210121 in words is "twenty billion, one hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".