21012112202027 has 2 divisors, whose sum is σ = 21012112202028. Its totient is φ = 21012112202026.

The previous prime is 21012112201987. The next prime is 21012112202041. The reversal of 21012112202027 is 72020221121012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012112202027 - 2²⁴ = 21012095424811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21012112201993 and 21012112202011.

It is not a weakly prime, because it can be changed into another prime (21012112202327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506056101013 + 10506056101014.

It is an arithmetic number, because the mean of its divisors is an integer number (10506056101014).

Almost surely, 2^{21012112202027} is an apocalyptic number.

21012112202027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012112202027 is an equidigital number, since it uses as much as digits as its factorization.

21012112202027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21012112202027 its reverse (72020221121012), we get a palindrome (93032333323039).

The spelling of 21012112202027 in words is "twenty-one trillion, twelve billion, one hundred twelve million, two hundred two thousand, twenty-seven".