21033020102 has 16 divisors (see below), whose sum is σ = 33916631040. Its totient is φ = 9751029768.

The previous prime is 21033020087. The next prime is 21033020179. The reversal of 21033020102 is 20102033012.

It is a happy number.

It is a super-2 number, since 2×21033020102² (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 in 7 ways as a sum of consecutive naturals, for example, 5886518 + ... + 5890089.

It is an arithmetic number, because the mean of its divisors is an integer number (2119789440).

Almost surely, 2^21033020102 is an apocalyptic number.

21033020102 is a deficient number, since it is larger than the sum of its proper divisors (12883610938).

21033020102 is a wasteful number, since it uses less digits than its factorization.

21033020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11776675.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21033020102 its reverse (20102033012), we get a palindrome (41135053114).

The spelling of 21033020102 in words is "twenty-one billion, thirty-three million, twenty thousand, one hundred two".