1101020121973 has 2 divisors, whose sum is σ = 1101020121974. Its totient is φ = 1101020121972.

The previous prime is 1101020121907. The next prime is 1101020122043. The reversal of 1101020121973 is 3791210201011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901812331044 + 199207790929 = 949638^2 + 446327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101020121973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101020131973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550510060986 + 550510060987.

It is an arithmetic number, because the mean of its divisors is an integer number (550510060987).

Almost surely, 2^{1101020121973} is an apocalyptic number.

It is an amenable number.

1101020121973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101020121973 is an equidigital number, since it uses as much as digits as its factorization.

1101020121973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 28.

Adding to 1101020121973 its reverse (3791210201011), we get a palindrome (4892230322984).

The spelling of 1101020121973 in words is "one trillion, one hundred one billion, twenty million, one hundred twenty-one thousand, nine hundred seventy-three".