2051121601065 has 8 divisors (see below), whose sum is σ = 3281794561728. Its totient is φ = 1093931520560.

The previous prime is 2051121601057. The next prime is 2051121601073. The reversal of 2051121601065 is 5601061211502.

It is an interprime number because it is at equal distance from previous prime (2051121601057) and next prime (2051121601073).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2051121601065 - 2³ = 2051121601057 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 68370720021 + ... + 68370720050.

It is an arithmetic number, because the mean of its divisors is an integer number (410224320216).

Almost surely, 2^{2051121601065} is an apocalyptic number.

It is an amenable number.

2051121601065 is a deficient number, since it is larger than the sum of its proper divisors (1230672960663).

2051121601065 is a wasteful number, since it uses less digits than its factorization.

2051121601065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136741440079.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 2051121601065 its reverse (5601061211502), we get a palindrome (7652182812567).

The spelling of 2051121601065 in words is "two trillion, fifty-one billion, one hundred twenty-one million, six hundred one thousand, sixty-five".