1220120212229 has 2 divisors, whose sum is σ = 1220120212230. Its totient is φ = 1220120212228.

The previous prime is 1220120212211. The next prime is 1220120212231. The reversal of 1220120212229 is 9222120210221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644691767329 + 575428444900 = 802927^2 + 758570^2 .

It is an emirp because it is prime and its reverse (9222120210221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220120212229 is a prime.

It is a super-2 number, since 2×1220120212229² (a number of 25 digits) contains 22 as substring.

Together with 1220120212231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220120212198 and 1220120212207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220120212249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060106114 + 610060106115.

It is an arithmetic number, because the mean of its divisors is an integer number (610060106115).

Almost surely, 2^{1220120212229} is an apocalyptic number.

It is an amenable number.

1220120212229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120212229 is an equidigital number, since it uses as much as digits as its factorization.

1220120212229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 1220120212229 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-nine".