1020121999933 has 2 divisors, whose sum is σ = 1020121999934. Its totient is φ = 1020121999932.

The previous prime is 1020121999901. The next prime is 1020122000057. The reversal of 1020121999933 is 3399991210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 510443089209 + 509678910724 = 714453^2 + 713918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020121999933 - 2⁵ = 1020121999901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020121999133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510060999966 + 510060999967.

It is an arithmetic number, because the mean of its divisors is an integer number (510060999967).

Almost surely, 2^{1020121999933} is an apocalyptic number.

It is an amenable number.

1020121999933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020121999933 is an equidigital number, since it uses as much as digits as its factorization.

1020121999933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 49.

The spelling of 1020121999933 in words is "one trillion, twenty billion, one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred thirty-three".