20200221611 has 2 divisors, whose sum is σ = 20200221612. Its totient is φ = 20200221610.

The previous prime is 20200221607. The next prime is 20200221623. The reversal of 20200221611 is 11612200202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200221611 - 2² = 20200221607 is a prime.

It is a super-2 number, since 2×20200221611² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20200221611.

It is not a weakly prime, because it can be changed into another prime (20200221631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100110805 + 10100110806.

It is an arithmetic number, because the mean of its divisors is an integer number (10100110806).

Almost surely, 2^20200221611 is an apocalyptic number.

20200221611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200221611 is an equidigital number, since it uses as much as digits as its factorization.

20200221611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20200221611 its reverse (11612200202), we get a palindrome (31812421813).

The spelling of 20200221611 in words is "twenty billion, two hundred million, two hundred twenty-one thousand, six hundred eleven".