20102132121 has 4 divisors (see below), whose sum is σ = 26802842832. Its totient is φ = 13401421412.

The previous prime is 20102132119. The next prime is 20102132143. The reversal of 20102132121 is 12123120102.

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 20102132121 - 2¹ = 20102132119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102132121.

It is not an unprimeable number, because it can be changed into a prime (20102132521) 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, 3350355351 + ... + 3350355356.

It is an arithmetic number, because the mean of its divisors is an integer number (6700710708).

Almost surely, 2^20102132121 is an apocalyptic number.

It is an amenable number.

20102132121 is a deficient number, since it is larger than the sum of its proper divisors (6700710711).

20102132121 is an equidigital number, since it uses as much as digits as its factorization.

20102132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700710710.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20102132121 its reverse (12123120102), we get a palindrome (32225252223).

The spelling of 20102132121 in words is "twenty billion, one hundred two million, one hundred thirty-two thousand, one hundred twenty-one".