21011120102 has 16 divisors (see below), whose sum is σ = 36032532480. Its totient is φ = 9001398408.

The previous prime is 21011120093. The next prime is 21011120129. The reversal of 21011120102 is 20102111012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241652 + ... + 316887.

It is an arithmetic number, because the mean of its divisors is an integer number (2252033280).

Almost surely, 2^21011120102 is an apocalyptic number.

21011120102 is a deficient number, since it is larger than the sum of its proper divisors (15021412378).

21011120102 is a wasteful number, since it uses less digits than its factorization.

21011120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561235.

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

Adding to 21011120102 its reverse (20102111012), we get a palindrome (41113231114).

The spelling of 21011120102 in words is "twenty-one billion, eleven million, one hundred twenty thousand, one hundred two".