2121103131229 has 2 divisors, whose sum is σ = 2121103131230. Its totient is φ = 2121103131228.

The previous prime is 2121103131131. The next prime is 2121103131263. The reversal of 2121103131229 is 9221313011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2103413599225 + 17689532004 = 1450315^2 + 133002^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121103131229 - 2³⁷ = 1983664177757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121103131197 and 2121103131206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121103131269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060551565614 + 1060551565615.

It is an arithmetic number, because the mean of its divisors is an integer number (1060551565615).

Almost surely, 2^{2121103131229} is an apocalyptic number.

It is an amenable number.

2121103131229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121103131229 is an equidigital number, since it uses as much as digits as its factorization.

2121103131229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 2121103131229 in words is "two trillion, one hundred twenty-one billion, one hundred three million, one hundred thirty-one thousand, two hundred twenty-nine".