21202102101019 has 16 divisors (see below), whose sum is σ = 24628872312000. Its totient is φ = 17874822706560.

The previous prime is 21202102101017. The next prime is 21202102101067. The reversal of 21202102101019 is 91010120120212.

It is a cyclic number.

It is not a de Polignac number, because 21202102101019 - 2¹ = 21202102101017 is a prime.

It is a super-2 number, since 2×21202102101019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202102101017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15507357 + ... + 16819105.

It is an arithmetic number, because the mean of its divisors is an integer number (1539304519500).

Almost surely, 2^{21202102101019} is an apocalyptic number.

21202102101019 is a deficient number, since it is larger than the sum of its proper divisors (3426770210981).

21202102101019 is a wasteful number, since it uses less digits than its factorization.

21202102101019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349670.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21202102101019 in words is "twenty-one trillion, two hundred two billion, one hundred two million, one hundred one thousand, nineteen".