21012012022211 has 8 divisors (see below), whose sum is σ = 24572186817024. Its totient is φ = 17591451925320.

The previous prime is 21012012022201. The next prime is 21012012022217. The reversal of 21012012022211 is 11222021021012.

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

It is not a de Polignac number, because 21012012022211 - 2²⁶ = 21011944913347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21012012022211.

It is not an unprimeable number, because it can be changed into a prime (21012012022217) 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, 34903674155 + ... + 34903674756.

It is an arithmetic number, because the mean of its divisors is an integer number (3071523352128).

Almost surely, 2^{21012012022211} is an apocalyptic number.

21012012022211 is a deficient number, since it is larger than the sum of its proper divisors (3560174794813).

21012012022211 is an equidigital number, since it uses as much as digits as its factorization.

21012012022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69807348961.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012012022211 its reverse (11222021021012), we get a palindrome (32234033043223).

The spelling of 21012012022211 in words is "twenty-one trillion, twelve billion, twelve million, twenty-two thousand, two hundred eleven".