21012000102211 has 8 divisors (see below), whose sum is σ = 21530291378400. Its totient is φ = 20493985181760.

The previous prime is 21012000102193. The next prime is 21012000102257. The reversal of 21012000102211 is 11220100021012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21012000102211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012000102191 and 21012000102200.

It is not an unprimeable number, because it can be changed into a prime (21012000102271) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68934991 + ... + 69239128.

It is an arithmetic number, because the mean of its divisors is an integer number (2691286422300).

Almost surely, 2^{21012000102211} is an apocalyptic number.

21012000102211 is a deficient number, since it is larger than the sum of its proper divisors (518291276189).

21012000102211 is a wasteful number, since it uses less digits than its factorization.

21012000102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138177869.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21012000102211 its reverse (11220100021012), we get a palindrome (32232100123223).

The spelling of 21012000102211 in words is "twenty-one trillion, twelve billion, one hundred two thousand, two hundred eleven".