1211212220027 has 2 divisors, whose sum is σ = 1211212220028. Its totient is φ = 1211212220026.

The previous prime is 1211212219981. The next prime is 1211212220041. The reversal of 1211212220027 is 7200222121121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211212220027 - 2⁸ = 1211212219771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211212219984 and 1211212220011.

It is not a weakly prime, because it can be changed into another prime (1211212220087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605606110013 + 605606110014.

It is an arithmetic number, because the mean of its divisors is an integer number (605606110014).

Almost surely, 2^{1211212220027} is an apocalyptic number.

1211212220027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211212220027 is an equidigital number, since it uses as much as digits as its factorization.

1211212220027 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 1211212220027 its reverse (7200222121121), we get a palindrome (8411434341148).

The spelling of 1211212220027 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty thousand, twenty-seven".