21012001010211 has 8 divisors (see below), whose sum is σ = 28120150051920. Its totient is φ = 13955926320992.

The previous prime is 21012001010183. The next prime is 21012001010233. The reversal of 21012001010211 is 11201010021012.

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

It is a cyclic number.

It is not a de Polignac number, because 21012001010211 - 2¹³ = 21012001002019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012001010251) 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, 13018587180 + ... + 13018588793.

It is an arithmetic number, because the mean of its divisors is an integer number (3515018756490).

Almost surely, 2^{21012001010211} is an apocalyptic number.

21012001010211 is a deficient number, since it is larger than the sum of its proper divisors (7108149041709).

21012001010211 is a wasteful number, since it uses less digits than its factorization.

21012001010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26037176245.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21012001010211 its reverse (11201010021012), we get a palindrome (32213011031223).

The spelling of 21012001010211 in words is "twenty-one trillion, twelve billion, one million, ten thousand, two hundred eleven".