203121023302969 has 2 divisors, whose sum is σ = 203121023302970. Its totient is φ = 203121023302968.

The previous prime is 203121023302949. The next prime is 203121023303039. The reversal of 203121023302969 is 969203320121302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129600465008400 + 73520558294569 = 11384220^2 + 8574413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203121023302969 is a prime.

It is a super-2 number, since 2×203121023302969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203121023302949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101560511651484 + 101560511651485.

It is an arithmetic number, because the mean of its divisors is an integer number (101560511651485).

Almost surely, 2^{203121023302969} is an apocalyptic number.

It is an amenable number.

203121023302969 is a deficient number, since it is larger than the sum of its proper divisors (1).

203121023302969 is an equidigital number, since it uses as much as digits as its factorization.

203121023302969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 203121023302969 in words is "two hundred three trillion, one hundred twenty-one billion, twenty-three million, three hundred two thousand, nine hundred sixty-nine".