1012121005165 has 16 divisors (see below), whose sum is σ = 1221158312640. Its totient is φ = 805293457920.

The previous prime is 1012121005141. The next prime is 1012121005171. The reversal of 1012121005165 is 5615001212101.

It is not a de Polignac number, because 1012121005165 - 2¹³ = 1012120996973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1169341 + ... + 1841629.

It is an arithmetic number, because the mean of its divisors is an integer number (76322394540).

Almost surely, 2^{1012121005165} is an apocalyptic number.

It is an amenable number.

1012121005165 is a deficient number, since it is larger than the sum of its proper divisors (209037307475).

1012121005165 is a wasteful number, since it uses less digits than its factorization.

1012121005165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673932.

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 1012121005165 its reverse (5615001212101), we get a palindrome (6627122217266).

The spelling of 1012121005165 in words is "one trillion, twelve billion, one hundred twenty-one million, five thousand, one hundred sixty-five".