121221201000973 has 2 divisors, whose sum is σ = 121221201000974. Its totient is φ = 121221201000972.

The previous prime is 121221201000959. The next prime is 121221201001013. The reversal of 121221201000973 is 379000102122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98430249124804 + 22790951876169 = 9921202^2 + 4773987^2 .

It is an emirp because it is prime and its reverse (379000102122121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221201000973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221201000373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610600500486 + 60610600500487.

It is an arithmetic number, because the mean of its divisors is an integer number (60610600500487).

Almost surely, 2^{121221201000973} is an apocalyptic number.

It is an amenable number.

121221201000973 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221201000973 is an equidigital number, since it uses as much as digits as its factorization.

121221201000973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 121221201000973 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, nine hundred seventy-three", and thus it is an aban number.