20122121207 has 2 divisors, whose sum is σ = 20122121208. Its totient is φ = 20122121206.

The previous prime is 20122121177. The next prime is 20122121293. The reversal of 20122121207 is 70212122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20122121207 - 2¹⁶ = 20122055671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122121407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061060603 + 10061060604.

It is an arithmetic number, because the mean of its divisors is an integer number (10061060604).

Almost surely, 2^20122121207 is an apocalyptic number.

20122121207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122121207 is an equidigital number, since it uses as much as digits as its factorization.

20122121207 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 20122121207 its reverse (70212122102), we get a palindrome (90334243309).

The spelling of 20122121207 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred seven".