2051015434621 has 2 divisors, whose sum is σ = 2051015434622. Its totient is φ = 2051015434620.

The previous prime is 2051015434619. The next prime is 2051015434697. The reversal of 2051015434621 is 1264345101502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181701617721 + 869313816900 = 1087061^2 + 932370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051015434621 - 2¹ = 2051015434619 is a prime.

Together with 2051015434619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051015464621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025507717310 + 1025507717311.

It is an arithmetic number, because the mean of its divisors is an integer number (1025507717311).

Almost surely, 2^{2051015434621} is an apocalyptic number.

It is an amenable number.

2051015434621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051015434621 is an equidigital number, since it uses as much as digits as its factorization.

2051015434621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 2051015434621 in words is "two trillion, fifty-one billion, fifteen million, four hundred thirty-four thousand, six hundred twenty-one".