21000121121102 has 8 divisors (see below), whose sum is σ = 31500229776456. Its totient is φ = 10500044528952.

The previous prime is 21000121121093. The next prime is 21000121121117. The reversal of 21000121121102 is 20112112100012.

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, 6305408 + ... + 9042035.

It is an arithmetic number, because the mean of its divisors is an integer number (3937528722057).

Almost surely, 2^{21000121121102} is an apocalyptic number.

21000121121102 is a deficient number, since it is larger than the sum of its proper divisors (10500108655354).

21000121121102 is a wasteful number, since it uses less digits than its factorization.

21000121121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031602.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21000121121102 its reverse (20112112100012), we get a palindrome (41112233221114).

The spelling of 21000121121102 in words is "twenty-one trillion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred two".