1721011121426 has 16 divisors (see below), whose sum is σ = 2582652703488. Its totient is φ = 860126979600.

The previous prime is 1721011121377. The next prime is 1721011121483. The reversal of 1721011121426 is 6241211101271.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46948661 + ... + 46985303.

It is an arithmetic number, because the mean of its divisors is an integer number (161415793968).

Almost surely, 2^{1721011121426} is an apocalyptic number.

1721011121426 is a deficient number, since it is larger than the sum of its proper divisors (861641582062).

1721011121426 is a wasteful number, since it uses less digits than its factorization.

1721011121426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46337.

The product of its (nonzero) digits is 1344, while the sum is 29.

Adding to 1721011121426 its reverse (6241211101271), we get a palindrome (7962222222697).

The spelling of 1721011121426 in words is "one trillion, seven hundred twenty-one billion, eleven million, one hundred twenty-one thousand, four hundred twenty-six".