20211201497 has 2 divisors, whose sum is σ = 20211201498. Its totient is φ = 20211201496.

The previous prime is 20211201481. The next prime is 20211201523. The reversal of 20211201497 is 79410211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20203495321 + 7706176 = 142139^2 + 2776^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211201497 - 2⁴ = 20211201481 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211201457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105600748 + 10105600749.

It is an arithmetic number, because the mean of its divisors is an integer number (10105600749).

Almost surely, 2^20211201497 is an apocalyptic number.

It is an amenable number.

20211201497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211201497 is an equidigital number, since it uses as much as digits as its factorization.

20211201497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

Adding to 20211201497 its reverse (79410211202), we get a palindrome (99621412699).

The spelling of 20211201497 in words is "twenty billion, two hundred eleven million, two hundred one thousand, four hundred ninety-seven".