21011120100212 has 12 divisors (see below), whose sum is σ = 40112138373216. Its totient is φ = 9550509136440.

The previous prime is 21011120100211. The next prime is 21011120100239. The reversal of 21011120100212 is 21200102111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011120100211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238762728368 + ... + 238762728455.

It is an arithmetic number, because the mean of its divisors is an integer number (3342678197768).

Almost surely, 2^{21011120100212} is an apocalyptic number.

21011120100212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21011120100212 is a deficient number, since it is larger than the sum of its proper divisors (19101018273004).

21011120100212 is a wasteful number, since it uses less digits than its factorization.

21011120100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477525456838 (or 477525456836 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21011120100212 its reverse (21200102111012), we get a palindrome (42211222211224).

The spelling of 21011120100212 in words is "twenty-one trillion, eleven billion, one hundred twenty million, one hundred thousand, two hundred twelve".