1721005262131 has 8 divisors (see below), whose sum is σ = 1780374757680. Its totient is φ = 1661637399072.

The previous prime is 1721005262107. The next prime is 1721005262143. The reversal of 1721005262131 is 1312625001271.

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 1721005262131 - 2¹¹ = 1721005260083 is a prime.

It is a super-2 number, since 2×1721005262131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1721005262093 and 1721005262102.

It is not an unprimeable number, because it can be changed into a prime (1721005265131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1972041 + ... + 2707573.

It is an arithmetic number, because the mean of its divisors is an integer number (222546844710).

Almost surely, 2^{1721005262131} is an apocalyptic number.

1721005262131 is a deficient number, since it is larger than the sum of its proper divisors (59369495549).

1721005262131 is an equidigital number, since it uses as much as digits as its factorization.

1721005262131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816245.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 1721005262131 in words is "one trillion, seven hundred twenty-one billion, five million, two hundred sixty-two thousand, one hundred thirty-one".