1721136206051 has 8 divisors (see below), whose sum is σ = 1735652318400. Its totient is φ = 1706640967720.

The previous prime is 1721136206017. The next prime is 1721136206123. The reversal of 1721136206051 is 1506026311271.

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 1721136206051 - 2¹⁰ = 1721136205027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1721136206851) 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, 5052881 + ... + 5382738.

It is an arithmetic number, because the mean of its divisors is an integer number (216956539800).

Almost surely, 2^{1721136206051} is an apocalyptic number.

1721136206051 is a deficient number, since it is larger than the sum of its proper divisors (14516112349).

1721136206051 is a wasteful number, since it uses less digits than its factorization.

1721136206051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437009.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 1721136206051 in words is "one trillion, seven hundred twenty-one billion, one hundred thirty-six million, two hundred six thousand, fifty-one".