20120201077 has 2 divisors, whose sum is σ = 20120201078. Its totient is φ = 20120201076.

The previous prime is 20120201071. The next prime is 20120201081. The reversal of 20120201077 is 77010202102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11149459281 + 8970741796 = 105591^2 + 94714^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120201077 - 2¹⁵ = 20120168309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120201071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060100538 + 10060100539.

It is an arithmetic number, because the mean of its divisors is an integer number (10060100539).

Almost surely, 2^20120201077 is an apocalyptic number.

It is an amenable number.

20120201077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120201077 is an equidigital number, since it uses as much as digits as its factorization.

20120201077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

Adding to 20120201077 its reverse (77010202102), we get a palindrome (97130403179).

The spelling of 20120201077 in words is "twenty billion, one hundred twenty million, two hundred one thousand, seventy-seven".