2179450294121 has 2 divisors, whose sum is σ = 2179450294122. Its totient is φ = 2179450294120.

The previous prime is 2179450294103. The next prime is 2179450294181. The reversal of 2179450294121 is 1214920549712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1306309557721 + 873140736400 = 1142939^2 + 934420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2179450294121 is a prime.

It is a super-2 number, since 2×2179450294121² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2179450294181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089725147060 + 1089725147061.

It is an arithmetic number, because the mean of its divisors is an integer number (1089725147061).

Almost surely, 2^{2179450294121} is an apocalyptic number.

It is an amenable number.

2179450294121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179450294121 is an equidigital number, since it uses as much as digits as its factorization.

2179450294121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 2179450294121 in words is "two trillion, one hundred seventy-nine billion, four hundred fifty million, two hundred ninety-four thousand, one hundred twenty-one".