21001012100222 has 24 divisors (see below), whose sum is σ = 39975952534200. Its totient is φ = 8182212506160.

The previous prime is 21001012100143. The next prime is 21001012100279. The reversal of 21001012100222 is 22200121010012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21001012100197 and 21001012100206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9740728097 + ... + 9740730252.

It is an arithmetic number, because the mean of its divisors is an integer number (1665664688925).

Almost surely, 2^{21001012100222} is an apocalyptic number.

21001012100222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001012100222 is a deficient number, since it is larger than the sum of its proper divisors (18974940433978).

21001012100222 is a wasteful number, since it uses less digits than its factorization.

21001012100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19481458376 (or 19481458369 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001012100222 its reverse (22200121010012), we get a palindrome (43201133110234).

The spelling of 21001012100222 in words is "twenty-one trillion, one billion, twelve million, one hundred thousand, two hundred twenty-two".