21112001030077 has 2 divisors, whose sum is σ = 21112001030078. Its totient is φ = 21112001030076.

The previous prime is 21112001030053. The next prime is 21112001030143. The reversal of 21112001030077 is 77003010021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11163710993796 + 9948290036281 = 3341214^2 + 3154091^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112001030077 - 2¹⁵ = 21112000997309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112001030017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556000515038 + 10556000515039.

It is an arithmetic number, because the mean of its divisors is an integer number (10556000515039).

Almost surely, 2^{21112001030077} is an apocalyptic number.

It is an amenable number.

21112001030077 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112001030077 is an equidigital number, since it uses as much as digits as its factorization.

21112001030077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

Adding to 21112001030077 its reverse (77003010021112), we get a palindrome (98115011051189).

The spelling of 21112001030077 in words is "twenty-one trillion, one hundred twelve billion, one million, thirty thousand, seventy-seven".