20212233077 has 2 divisors, whose sum is σ = 20212233078. Its totient is φ = 20212233076.

The previous prime is 20212233073. The next prime is 20212233091. The reversal of 20212233077 is 77033221202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17512287556 + 2699945521 = 132334^2 + 51961^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212233077 - 2² = 20212233073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212233073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106116538 + 10106116539.

It is an arithmetic number, because the mean of its divisors is an integer number (10106116539).

Almost surely, 2^20212233077 is an apocalyptic number.

It is an amenable number.

20212233077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212233077 is an equidigital number, since it uses as much as digits as its factorization.

20212233077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

Adding to 20212233077 its reverse (77033221202), we get a palindrome (97245454279).

The spelling of 20212233077 in words is "twenty billion, two hundred twelve million, two hundred thirty-three thousand, seventy-seven".