21202122986 has 32 divisors (see below), whose sum is σ = 34835645376. Its totient is φ = 9598176000.

The previous prime is 21202122979. The next prime is 21202123013. The reversal of 21202122986 is 68922120212.

It is a happy number.

It is a super-2 number, since 2×21202122986² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 6580856 + ... + 6584076.

It is an arithmetic number, because the mean of its divisors is an integer number (1088613918).

Almost surely, 2^21202122986 is an apocalyptic number.

21202122986 is a deficient number, since it is larger than the sum of its proper divisors (13633522390).

21202122986 is a wasteful number, since it uses less digits than its factorization.

21202122986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 21202122986 in words is "twenty-one billion, two hundred two million, one hundred twenty-two thousand, nine hundred eighty-six".