1621030073111 has 24 divisors (see below), whose sum is σ = 1871097116160. Its totient is φ = 1398751459200.

The previous prime is 1621030073107. The next prime is 1621030073161. The reversal of 1621030073111 is 1113700301261.

It is not a de Polignac number, because 1621030073111 - 2² = 1621030073107 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 (1621030073161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4591325 + ... + 4931766.

It is an arithmetic number, because the mean of its divisors is an integer number (77962379840).

Almost surely, 2^{1621030073111} is an apocalyptic number.

1621030073111 is a deficient number, since it is larger than the sum of its proper divisors (250067043049).

1621030073111 is a wasteful number, since it uses less digits than its factorization.

1621030073111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9523175 (or 9523158 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 1621030073111 its reverse (1113700301261), we get a palindrome (2734730374372).

The spelling of 1621030073111 in words is "one trillion, six hundred twenty-one billion, thirty million, seventy-three thousand, one hundred eleven".