1621031240103 has 16 divisors (see below), whose sum is σ = 2358607814400. Its totient is φ = 982133095680.

The previous prime is 1621031240077. The next prime is 1621031240111. The reversal of 1621031240103 is 3010421301261.

It is a happy number.

It is not a de Polignac number, because 1621031240103 - 2¹⁷ = 1621031109031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621031240183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7645843 + ... + 7854996.

It is an arithmetic number, because the mean of its divisors is an integer number (147412988400).

Almost surely, 2^{1621031240103} is an apocalyptic number.

1621031240103 is a deficient number, since it is larger than the sum of its proper divisors (737576574297).

1621031240103 is a wasteful number, since it uses less digits than its factorization.

1621031240103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15504022.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1621031240103 its reverse (3010421301261), we get a palindrome (4631452541364).

The spelling of 1621031240103 in words is "one trillion, six hundred twenty-one billion, thirty-one million, two hundred forty thousand, one hundred three".