21012220100211 has 8 divisors (see below), whose sum is σ = 28056838033344. Its totient is φ = 13987874450280.

The previous prime is 21012220100203. The next prime is 21012220100227. The reversal of 21012220100211 is 11200102221012.

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

It is not a de Polignac number, because 21012220100211 - 2³ = 21012220100203 is a prime.

It is a super-2 number, since 2×21012220100211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21012220100281) 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, 5068068381 + ... + 5068072526.

It is an arithmetic number, because the mean of its divisors is an integer number (3507104754168).

Almost surely, 2^{21012220100211} is an apocalyptic number.

21012220100211 is a deficient number, since it is larger than the sum of its proper divisors (7044617933133).

21012220100211 is a wasteful number, since it uses less digits than its factorization.

21012220100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10136141601.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21012220100211 its reverse (11200102221012), we get a palindrome (32212322321223).

The spelling of 21012220100211 in words is "twenty-one trillion, twelve billion, two hundred twenty million, one hundred thousand, two hundred eleven".