21002100002086 has 16 divisors (see below), whose sum is σ = 36006211372320. Its totient is φ = 9000247158720.

The previous prime is 21002100002063. The next prime is 21002100002087. The reversal of 21002100002086 is 68020000120012.

It is a super-2 number, since 2×21002100002086² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002100002087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54203575 + ... + 54589666.

It is an arithmetic number, because the mean of its divisors is an integer number (2250388210770).

Almost surely, 2^{21002100002086} is an apocalyptic number.

21002100002086 is a deficient number, since it is larger than the sum of its proper divisors (15004111370234).

21002100002086 is a wasteful number, since it uses less digits than its factorization.

21002100002086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108807039.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21002100002086 its reverse (68020000120012), we get a palindrome (89022100122098).

The spelling of 21002100002086 in words is "twenty-one trillion, two billion, one hundred million, two thousand, eighty-six".