21102022001986 has 4 divisors (see below), whose sum is σ = 31653033002982. Its totient is φ = 10551011000992.

The previous prime is 21102022001941. The next prime is 21102022002029. The reversal of 21102022001986 is 68910022020112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11865096930625 + 9236925071361 = 3444575^2 + 3039231^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275505500495 + ... + 5275505500498.

Almost surely, 2^{21102022001986} is an apocalyptic number.

21102022001986 is a deficient number, since it is larger than the sum of its proper divisors (10551011000996).

21102022001986 is a wasteful number, since it uses less digits than its factorization.

21102022001986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551011000995.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 21102022001986 in words is "twenty-one trillion, one hundred two billion, twenty-two million, one thousand, nine hundred eighty-six".