1102102120621 has 2 divisors, whose sum is σ = 1102102120622. Its totient is φ = 1102102120620.

The previous prime is 1102102120601. The next prime is 1102102120673. The reversal of 1102102120621 is 1260212012011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945151451721 + 156950668900 = 972189^2 + 396170^2 .

It is an emirp because it is prime and its reverse (1260212012011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1102102120621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1102102120601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551051060310 + 551051060311.

It is an arithmetic number, because the mean of its divisors is an integer number (551051060311).

Almost surely, 2^{1102102120621} is an apocalyptic number.

It is an amenable number.

1102102120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102102120621 is an equidigital number, since it uses as much as digits as its factorization.

1102102120621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1102102120621 its reverse (1260212012011), we get a palindrome (2362314132632).

The spelling of 1102102120621 in words is "one trillion, one hundred two billion, one hundred two million, one hundred twenty thousand, six hundred twenty-one".