21110102010 has 32 divisors (see below), whose sum is σ = 56293606080. Its totient is φ = 5629360464.

The previous prime is 21110102009. The next prime is 21110102021. The reversal of 21110102010 is 1020101112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21110101983 and 21110102001.

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 15 ways as a sum of consecutive naturals, for example, 39092512 + ... + 39093051.

It is an arithmetic number, because the mean of its divisors is an integer number (1759175190).

Almost surely, 2^21110102010 is an apocalyptic number.

21110102010 is an abundant number, since it is smaller than the sum of its proper divisors (35183504070).

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

21110102010 is a wasteful number, since it uses less digits than its factorization.

21110102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78185579 (or 78185573 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21110102010 its reverse (1020101112), we get a palindrome (22130203122).

The spelling of 21110102010 in words is "twenty-one billion, one hundred ten million, one hundred two thousand, ten".