20201212019 has 2 divisors, whose sum is σ = 20201212020. Its totient is φ = 20201212018.

The previous prime is 20201211997. The next prime is 20201212039. The reversal of 20201212019 is 91021210202.

It is a happy number.

It is an a-pointer prime, because the next prime (20201212039) can be obtained adding 20201212019 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201212019 is a prime.

It is a super-2 number, since 2×20201212019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20201212039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100606009 + 10100606010.

It is an arithmetic number, because the mean of its divisors is an integer number (10100606010).

Almost surely, 2^20201212019 is an apocalyptic number.

20201212019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201212019 is an equidigital number, since it uses as much as digits as its factorization.

20201212019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20201212019 in words is "twenty billion, two hundred one million, two hundred twelve thousand, nineteen".