2121360155029 has 2 divisors, whose sum is σ = 2121360155030. Its totient is φ = 2121360155028.

The previous prime is 2121360155003. The next prime is 2121360155069. The reversal of 2121360155029 is 9205510631212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879635516004 + 241724639025 = 1370998^2 + 491655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121360155029 - 2¹⁷ = 2121360023957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121360155069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060680077514 + 1060680077515.

It is an arithmetic number, because the mean of its divisors is an integer number (1060680077515).

Almost surely, 2^{2121360155029} is an apocalyptic number.

It is an amenable number.

2121360155029 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121360155029 is an equidigital number, since it uses as much as digits as its factorization.

2121360155029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 2121360155029 in words is "two trillion, one hundred twenty-one billion, three hundred sixty million, one hundred fifty-five thousand, twenty-nine".