2651231220321 has 8 divisors (see below), whose sum is σ = 3537242429760. Its totient is φ = 1766353745552.

The previous prime is 2651231220299. The next prime is 2651231220383. The reversal of 2651231220321 is 1230221321562.

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 2651231220321 - 2⁷ = 2651231220193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2651231210321) 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, 283428210 + ... + 283437563.

It is an arithmetic number, because the mean of its divisors is an integer number (442155303720).

Almost surely, 2^{2651231220321} is an apocalyptic number.

It is an amenable number.

2651231220321 is a deficient number, since it is larger than the sum of its proper divisors (886011209439).

2651231220321 is a wasteful number, since it uses less digits than its factorization.

2651231220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566867335.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 2651231220321 its reverse (1230221321562), we get a palindrome (3881452541883).

The spelling of 2651231220321 in words is "two trillion, six hundred fifty-one billion, two hundred thirty-one million, two hundred twenty thousand, three hundred twenty-one".