20120212121077 has 2 divisors, whose sum is σ = 20120212121078. Its totient is φ = 20120212121076.

The previous prime is 20120212121063. The next prime is 20120212121117. The reversal of 20120212121077 is 77012121202102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18970258296196 + 1149953824881 = 4355486^2 + 1072359^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120212121077 - 2²³ = 20120203732469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120212121377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060106060538 + 10060106060539.

It is an arithmetic number, because the mean of its divisors is an integer number (10060106060539).

Almost surely, 2^{20120212121077} is an apocalyptic number.

It is an amenable number.

20120212121077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120212121077 is an equidigital number, since it uses as much as digits as its factorization.

20120212121077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 28.

Adding to 20120212121077 its reverse (77012121202102), we get a palindrome (97132333323179).

The spelling of 20120212121077 in words is "twenty trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, seventy-seven".