1102020120121 has 2 divisors, whose sum is σ = 1102020120122. Its totient is φ = 1102020120120.

The previous prime is 1102020120119. The next prime is 1102020120209. The reversal of 1102020120121 is 1210210202011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1084347342400 + 17672777721 = 1041320^2 + 132939^2 .

It is an emirp because it is prime and its reverse (1210210202011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1102020120121 - 2¹ = 1102020120119 is a prime.

Together with 1102020120119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1102020120521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551010060060 + 551010060061.

It is an arithmetic number, because the mean of its divisors is an integer number (551010060061).

Almost surely, 2^{1102020120121} is an apocalyptic number.

It is an amenable number.

1102020120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102020120121 is an equidigital number, since it uses as much as digits as its factorization.

1102020120121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1102020120121 its reverse (1210210202011), we get a palindrome (2312230322132).

The spelling of 1102020120121 in words is "one trillion, one hundred two billion, twenty million, one hundred twenty thousand, one hundred twenty-one".