21011121101102 has 8 divisors (see below), whose sum is σ = 34381834529112. Its totient is φ = 9550509591400.

The previous prime is 21011121101029. The next prime is 21011121101291. The reversal of 21011121101102 is 20110112111012.

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

It is a super-2 number, since 2×21011121101102² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477525479549 + ... + 477525479592.

It is an arithmetic number, because the mean of its divisors is an integer number (4297729316139).

Almost surely, 2^{21011121101102} is an apocalyptic number.

21011121101102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011121101102 is a deficient number, since it is larger than the sum of its proper divisors (13370713428010).

21011121101102 is a wasteful number, since it uses less digits than its factorization.

21011121101102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955050959154.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21011121101102 its reverse (20110112111012), we get a palindrome (41121233212114).

The spelling of 21011121101102 in words is "twenty-one trillion, eleven billion, one hundred twenty-one million, one hundred one thousand, one hundred two".