21201121112102 has 8 divisors (see below), whose sum is σ = 31802159420856. Its totient is φ = 10600401305152.

The previous prime is 21201121112099. The next prime is 21201121112111. The reversal of 21201121112102 is 20121112110212.

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, 79458968 + ... + 79725339.

It is an arithmetic number, because the mean of its divisors is an integer number (3975269927607).

Almost surely, 2^{21201121112102} is an apocalyptic number.

21201121112102 is a deficient number, since it is larger than the sum of its proper divisors (10601038308754).

21201121112102 is a wasteful number, since it uses less digits than its factorization.

21201121112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159250902.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21201121112102 its reverse (20121112110212), we get a palindrome (41322233222314).

The spelling of 21201121112102 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred two".