21120101102 has 4 divisors (see below), whose sum is σ = 31680151656. Its totient is φ = 10560050550.

The previous prime is 21120101089. The next prime is 21120101117. The reversal of 21120101102 is 20110102112.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21120101102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280025274 + ... + 5280025277.

It is an arithmetic number, because the mean of its divisors is an integer number (7920037914).

Almost surely, 2^21120101102 is an apocalyptic number.

21120101102 is a deficient number, since it is larger than the sum of its proper divisors (10560050554).

21120101102 is a wasteful number, since it uses less digits than its factorization.

21120101102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560050553.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21120101102 its reverse (20110102112), we get a palindrome (41230203214).

It can be divided in two parts, 2112010 and 1102, that added together give a palindrome (2113112).

The spelling of 21120101102 in words is "twenty-one billion, one hundred twenty million, one hundred one thousand, one hundred two".