20211201019 has 2 divisors, whose sum is σ = 20211201020. Its totient is φ = 20211201018.

The previous prime is 20211200993. The next prime is 20211201041. The reversal of 20211201019 is 91010211202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211201019 - 2¹¹ = 20211198971 is a prime.

It is a super-2 number, since 2×20211201019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211200987 and 20211201005.

It is not a weakly prime, because it can be changed into another prime (20211291019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105600509 + 10105600510.

It is an arithmetic number, because the mean of its divisors is an integer number (10105600510).

Almost surely, 2^20211201019 is an apocalyptic number.

20211201019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211201019 is an equidigital number, since it uses as much as digits as its factorization.

20211201019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 20211201019 in words is "twenty billion, two hundred eleven million, two hundred one thousand, nineteen".