21012211011102 has 64 divisors (see below), whose sum is σ = 42186914864640. Its totient is φ = 6977055102336.

The previous prime is 21012211011083. The next prime is 21012211011133. The reversal of 21012211011102 is 20111011221012.

It is a happy number.

It is a super-2 number, since 2×21012211011102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5974468248 + ... + 5974471764.

It is an arithmetic number, because the mean of its divisors is an integer number (659170544760).

Almost surely, 2^{21012211011102} is an apocalyptic number.

21012211011102 is an abundant number, since it is smaller than the sum of its proper divisors (21174703853538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012211011102 is a wasteful number, since it uses less digits than its factorization.

21012211011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7265.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21012211011102 its reverse (20111011221012), we get a palindrome (41123222232114).

The spelling of 21012211011102 in words is "twenty-one trillion, twelve billion, two hundred eleven million, eleven thousand, one hundred two".