1272204378091 has 16 divisors (see below), whose sum is σ = 1290831141600. Its totient is φ = 1253716247808.

The previous prime is 1272204378041. The next prime is 1272204378121. The reversal of 1272204378091 is 1908734022721.

It is a cyclic number.

It is not a de Polignac number, because 1272204378091 - 2⁷ = 1272204377963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272204378001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23007465 + ... + 23062693.

It is an arithmetic number, because the mean of its divisors is an integer number (80676946350).

Almost surely, 2^{1272204378091} is an apocalyptic number.

1272204378091 is a deficient number, since it is larger than the sum of its proper divisors (18626763509).

1272204378091 is a wasteful number, since it uses less digits than its factorization.

1272204378091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56478.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 1272204378091 in words is "one trillion, two hundred seventy-two billion, two hundred four million, three hundred seventy-eight thousand, ninety-one".