20002121147 has 2 divisors, whose sum is σ = 20002121148. Its totient is φ = 20002121146.

The previous prime is 20002121141. The next prime is 20002121149. The reversal of 20002121147 is 74112120002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20002121147 - 2¹⁴ = 20002104763 is a prime.

Together with 20002121149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20002121141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001060573 + 10001060574.

It is an arithmetic number, because the mean of its divisors is an integer number (10001060574).

Almost surely, 2^20002121147 is an apocalyptic number.

20002121147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002121147 is an equidigital number, since it uses as much as digits as its factorization.

20002121147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 20002121147 its reverse (74112120002), we get a palindrome (94114241149).

The spelling of 20002121147 in words is "twenty billion, two million, one hundred twenty-one thousand, one hundred forty-seven".