211021002105 has 32 divisors (see below), whose sum is σ = 339743351808. Its totient is φ = 111841636800.

The previous prime is 211021002097. The next prime is 211021002133. The reversal of 211021002105 is 501200120112.

It is not a de Polignac number, because 211021002105 - 2³ = 211021002097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12544150 + ... + 12560960.

It is an arithmetic number, because the mean of its divisors is an integer number (10616979744).

Almost surely, 2^211021002105 is an apocalyptic number.

It is an amenable number.

211021002105 is a deficient number, since it is larger than the sum of its proper divisors (128722349703).

211021002105 is a wasteful number, since it uses less digits than its factorization.

211021002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21997.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 211021002105 its reverse (501200120112), we get a palindrome (712221122217).

The spelling of 211021002105 in words is "two hundred eleven billion, twenty-one million, two thousand, one hundred five".