20000210121 has 16 divisors (see below), whose sum is σ = 29986931520. Its totient is φ = 13172827680.

The previous prime is 20000210081. The next prime is 20000210147. The reversal of 20000210121 is 12101200002.

It is not a de Polignac number, because 20000210121 - 2¹³ = 20000201929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20000212121) 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 15 ways as a sum of consecutive naturals, for example, 4460100 + ... + 4464581.

It is an arithmetic number, because the mean of its divisors is an integer number (1874183220).

Almost surely, 2^20000210121 is an apocalyptic number.

It is an amenable number.

20000210121 is a deficient number, since it is larger than the sum of its proper divisors (9986721399).

20000210121 is an equidigital number, since it uses as much as digits as its factorization.

20000210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8924773 (or 8924767 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20000210121 its reverse (12101200002), we get a palindrome (32101410123).

The spelling of 20000210121 in words is "twenty billion, two hundred ten thousand, one hundred twenty-one".