1280020131221 has 8 divisors (see below), whose sum is σ = 1378887869184. Its totient is φ = 1181210200560.

The previous prime is 1280020131167. The next prime is 1280020131223. The reversal of 1280020131221 is 1221310200821.

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

It is not a de Polignac number, because 1280020131221 - 2¹⁸ = 1280019869077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280020131223) 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, 14405825 + ... + 14494406.

It is an arithmetic number, because the mean of its divisors is an integer number (172360983648).

Almost surely, 2^{1280020131221} is an apocalyptic number.

It is an amenable number.

1280020131221 is a deficient number, since it is larger than the sum of its proper divisors (98867737963).

1280020131221 is a wasteful number, since it uses less digits than its factorization.

1280020131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28903651.

The product of its (nonzero) digits is 384, while the sum is 23.

The spelling of 1280020131221 in words is "one trillion, two hundred eighty billion, twenty million, one hundred thirty-one thousand, two hundred twenty-one".