1621434027099 has 16 divisors (see below), whose sum is σ = 2277810243072. Its totient is φ = 1023919499328.

The previous prime is 1621434027067. The next prime is 1621434027107. The reversal of 1621434027099 is 9907204341261.

It is not a de Polignac number, because 1621434027099 - 2⁵ = 1621434027067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1621434027599) 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, 114065922 + ... + 114080135.

It is an arithmetic number, because the mean of its divisors is an integer number (142363140192).

Almost surely, 2^{1621434027099} is an apocalyptic number.

1621434027099 is a deficient number, since it is larger than the sum of its proper divisors (656376215973).

1621434027099 is a wasteful number, since it uses less digits than its factorization.

1621434027099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228146186.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 1621434027099 in words is "one trillion, six hundred twenty-one billion, four hundred thirty-four million, twenty-seven thousand, ninety-nine".