2129178120201 has 24 divisors (see below), whose sum is σ = 3367448922240. Its totient is φ = 1285649301600.

The previous prime is 2129178120197. The next prime is 2129178120229. The reversal of 2129178120201 is 1020218719212.

It is not a de Polignac number, because 2129178120201 - 2² = 2129178120197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2129178120241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39653706 + ... + 39707363.

It is an arithmetic number, because the mean of its divisors is an integer number (140310371760).

Almost surely, 2^{2129178120201} is an apocalyptic number.

It is an amenable number.

2129178120201 is a deficient number, since it is larger than the sum of its proper divisors (1238270802039).

2129178120201 is a wasteful number, since it uses less digits than its factorization.

2129178120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79361357 (or 79361354 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 2129178120201 in words is "two trillion, one hundred twenty-nine billion, one hundred seventy-eight million, one hundred twenty thousand, two hundred one".