20202121007 has 2 divisors, whose sum is σ = 20202121008. Its totient is φ = 20202121006.

The previous prime is 20202120977. The next prime is 20202121057. The reversal of 20202121007 is 70012120202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202121007 - 2²⁴ = 20185343791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202121057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101060503 + 10101060504.

It is an arithmetic number, because the mean of its divisors is an integer number (10101060504).

Almost surely, 2^20202121007 is an apocalyptic number.

20202121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202121007 is an equidigital number, since it uses as much as digits as its factorization.

20202121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

Adding to 20202121007 its reverse (70012120202), we get a palindrome (90214241209).

The spelling of 20202121007 in words is "twenty billion, two hundred two million, one hundred twenty-one thousand, seven".