20011210200977 has 2 divisors, whose sum is σ = 20011210200978. Its totient is φ = 20011210200976.

The previous prime is 20011210200907. The next prime is 20011210201019. The reversal of 20011210200977 is 77900201211002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19994991923776 + 16218277201 = 4471576^2 + 127351^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011210200977 - 2⁸ = 20011210200721 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011210200907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005605100488 + 10005605100489.

It is an arithmetic number, because the mean of its divisors is an integer number (10005605100489).

Almost surely, 2^{20011210200977} is an apocalyptic number.

It is an amenable number.

20011210200977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011210200977 is an equidigital number, since it uses as much as digits as its factorization.

20011210200977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

Adding to 20011210200977 its reverse (77900201211002), we get a palindrome (97911411411979).

The spelling of 20011210200977 in words is "twenty trillion, eleven billion, two hundred ten million, two hundred thousand, nine hundred seventy-seven".