202220121012121 has 4 divisors (see below), whose sum is σ = 202226629785700. Its totient is φ = 202213612238544.

The previous prime is 202220121012071. The next prime is 202220121012233. The reversal of 202220121012121 is 121210121022202.

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 168387995073600 + 33832125938521 = 12976440^2 + 5816539^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220121012121 - 2²³ = 202220112623513 is a prime.

It is a super-2 number, since 2×202220121012121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202220121412121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3254340186 + ... + 3254402323.

It is an arithmetic number, because the mean of its divisors is an integer number (50556657446425).

Almost surely, 2^{202220121012121} is an apocalyptic number.

It is an amenable number.

202220121012121 is a deficient number, since it is larger than the sum of its proper divisors (6508773579).

202220121012121 is an equidigital number, since it uses as much as digits as its factorization.

202220121012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508773578.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202220121012121 its reverse (121210121022202), we get a palindrome (323430242034323).

The spelling of 202220121012121 in words is "two hundred two trillion, two hundred twenty billion, one hundred twenty-one million, twelve thousand, one hundred twenty-one".