2001145122465 has 32 divisors (see below), whose sum is σ = 3208058956800. Its totient is φ = 1065203541696.

The previous prime is 2001145122437. The next prime is 2001145122469. The reversal of 2001145122465 is 5642215411002.

It is a happy number.

It is not a de Polignac number, because 2001145122465 - 2¹⁰ = 2001145121441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001145122469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18882514 + ... + 18988196.

It is an arithmetic number, because the mean of its divisors is an integer number (100251842400).

Almost surely, 2^{2001145122465} is an apocalyptic number.

It is an amenable number.

2001145122465 is a deficient number, since it is larger than the sum of its proper divisors (1206913834335).

2001145122465 is a wasteful number, since it uses less digits than its factorization.

2001145122465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108133.

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 2001145122465 in words is "two trillion, one billion, one hundred forty-five million, one hundred twenty-two thousand, four hundred sixty-five".