1221120000211 has 2 divisors, whose sum is σ = 1221120000212. Its totient is φ = 1221120000210.

The previous prime is 1221120000193. The next prime is 1221120000223. The reversal of 1221120000211 is 1120000211221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221120000211 - 2⁷ = 1221120000083 is a prime.

It is a super-2 number, since 2×1221120000211² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221120000191 and 1221120000200.

It is not a weakly prime, because it can be changed into another prime (1221120000011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610560000105 + 610560000106.

It is an arithmetic number, because the mean of its divisors is an integer number (610560000106).

Almost surely, 2^{1221120000211} is an apocalyptic number.

1221120000211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221120000211 is an equidigital number, since it uses as much as digits as its factorization.

1221120000211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221120000211 its reverse (1120000211221), we get a palindrome (2341120211432).

The spelling of 1221120000211 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred eleven", and thus it is an aban number.