203121023011 has 2 divisors, whose sum is σ = 203121023012. Its totient is φ = 203121023010.

The previous prime is 203121022969. The next prime is 203121023033. The reversal of 203121023011 is 110320121302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203121023011 - 2¹⁵ = 203120990243 is a prime.

It is a super-2 number, since 2×203121023011² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203121023071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101560511505 + 101560511506.

It is an arithmetic number, because the mean of its divisors is an integer number (101560511506).

Almost surely, 2^203121023011 is an apocalyptic number.

203121023011 is a deficient number, since it is larger than the sum of its proper divisors (1).

203121023011 is an equidigital number, since it uses as much as digits as its factorization.

203121023011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 203121023011 its reverse (110320121302), we get a palindrome (313441144313).

The spelling of 203121023011 in words is "two hundred three billion, one hundred twenty-one million, twenty-three thousand, eleven".