21299999999898 has 32 divisors (see below), whose sum is σ = 42913108423296. Its totient is φ = 7047820479488.

The previous prime is 21299999999897. The next prime is 21299999999899. The reversal of 21299999999898 is 89899999999212.

It is an interprime number because it is at equal distance from previous prime (21299999999897) and next prime (21299999999899).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21299999999897) 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, 15948490 + ... + 17232362.

It is an arithmetic number, because the mean of its divisors is an integer number (1341034638228).

Almost surely, 2^{21299999999898} is an apocalyptic number.

21299999999898 is an abundant number, since it is smaller than the sum of its proper divisors (21613108423398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21299999999898 is a wasteful number, since it uses less digits than its factorization.

21299999999898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304198.

The product of its digits is 99179645184, while the sum is 102.

The spelling of 21299999999898 in words is "twenty-one trillion, two hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-eight".