21121000102 has 8 divisors (see below), whose sum is σ = 31683117816. Its totient is φ = 10559960832.

The previous prime is 21121000081. The next prime is 21121000129. The reversal of 21121000102 is 20100012112.

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

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, 218728 + ... + 300139.

It is an arithmetic number, because the mean of its divisors is an integer number (3960389727).

Almost surely, 2^21121000102 is an apocalyptic number.

21121000102 is a deficient number, since it is larger than the sum of its proper divisors (10562117714).

21121000102 is a wasteful number, since it uses less digits than its factorization.

21121000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539222.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21121000102 its reverse (20100012112), we get a palindrome (41221012214).

The spelling of 21121000102 in words is "twenty-one billion, one hundred twenty-one million, one hundred two", and thus it is an aban number.