21121430102 has 8 divisors (see below), whose sum is σ = 31733329800. Its totient is φ = 10543653504.

The previous prime is 21121430087. The next prime is 21121430129. The reversal of 21121430102 is 20103412112.

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

It is a super-2 number, since 2×21121430102² (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 3 ways as a sum of consecutive naturals, for example, 8529227 + ... + 8531702.

It is an arithmetic number, because the mean of its divisors is an integer number (3966666225).

Almost surely, 2^21121430102 is an apocalyptic number.

21121430102 is a deficient number, since it is larger than the sum of its proper divisors (10611899698).

21121430102 is a wasteful number, since it uses less digits than its factorization.

21121430102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17061550.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21121430102 its reverse (20103412112), we get a palindrome (41224842214).

The spelling of 21121430102 in words is "twenty-one billion, one hundred twenty-one million, four hundred thirty thousand, one hundred two".