20331220110121 has 4 divisors (see below), whose sum is σ = 20675817061200. Its totient is φ = 19986623159044.

The previous prime is 20331220110107. The next prime is 20331220110307. The reversal of 20331220110121 is 12101102213302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20331220110121 - 2¹⁵ = 20331220077353 is a prime.

It is a super-2 number, since 2×20331220110121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331220150121) 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, 172298475451 + ... + 172298475568.

It is an arithmetic number, because the mean of its divisors is an integer number (5168954265300).

Almost surely, 2^{20331220110121} is an apocalyptic number.

It is an amenable number.

20331220110121 is a deficient number, since it is larger than the sum of its proper divisors (344596951079).

20331220110121 is an equidigital number, since it uses as much as digits as its factorization.

20331220110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344596951078.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20331220110121 its reverse (12101102213302), we get a palindrome (32432322323423).

The spelling of 20331220110121 in words is "twenty trillion, three hundred thirty-one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-one".