2121003031157 has 2 divisors, whose sum is σ = 2121003031158. Its totient is φ = 2121003031156.

The previous prime is 2121003031067. The next prime is 2121003031193. The reversal of 2121003031157 is 7511303001212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2109622622116 + 11380409041 = 1452454^2 + 106679^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121003031157 - 2¹² = 2121003027061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121003031057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060501515578 + 1060501515579.

It is an arithmetic number, because the mean of its divisors is an integer number (1060501515579).

Almost surely, 2^{2121003031157} is an apocalyptic number.

It is an amenable number.

2121003031157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121003031157 is an equidigital number, since it uses as much as digits as its factorization.

2121003031157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 2121003031157 its reverse (7511303001212), we get a palindrome (9632306032369).

The spelling of 2121003031157 in words is "two trillion, one hundred twenty-one billion, three million, thirty-one thousand, one hundred fifty-seven".