1121202101221 has 2 divisors, whose sum is σ = 1121202101222. Its totient is φ = 1121202101220.

The previous prime is 1121202101177. The next prime is 1121202101237. The reversal of 1121202101221 is 1221012021211.

It is an a-pointer prime, because the next prime (1121202101237) can be obtained adding 1121202101221 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 877275756900 + 243926344321 = 936630^2 + 493889^2 .

It is an emirp because it is prime and its reverse (1221012021211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121202101221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121202101195 and 1121202101204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121202101251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560601050610 + 560601050611.

It is an arithmetic number, because the mean of its divisors is an integer number (560601050611).

Almost surely, 2^{1121202101221} is an apocalyptic number.

It is an amenable number.

1121202101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121202101221 is an equidigital number, since it uses as much as digits as its factorization.

1121202101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121202101221 its reverse (1221012021211), we get a palindrome (2342214122432).

The spelling of 1121202101221 in words is "one trillion, one hundred twenty-one billion, two hundred two million, one hundred one thousand, two hundred twenty-one".