1207379881721 has 8 divisors (see below), whose sum is σ = 1300309531584. Its totient is φ = 1114457985360.

The previous prime is 1207379881703. The next prime is 1207379881723. The reversal of 1207379881721 is 1271889737021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1207379881721 - 2²⁶ = 1207312772857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1207379881723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1612925 + ... + 2239706.

It is an arithmetic number, because the mean of its divisors is an integer number (162538691448).

Almost surely, 2^{1207379881721} is an apocalyptic number.

It is an amenable number.

1207379881721 is a deficient number, since it is larger than the sum of its proper divisors (92929649863).

1207379881721 is a wasteful number, since it uses less digits than its factorization.

1207379881721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876751.

The product of its (nonzero) digits is 2370816, while the sum is 56.

The spelling of 1207379881721 in words is "one trillion, two hundred seven billion, three hundred seventy-nine million, eight hundred eighty-one thousand, seven hundred twenty-one".