21020001221102 has 8 divisors (see below), whose sum is σ = 33955386587976. Its totient is φ = 9701539025112.

The previous prime is 21020001221099. The next prime is 21020001221123. The reversal of 21020001221102 is 20112210002012.

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, 404230792688 + ... + 404230792739.

It is an arithmetic number, because the mean of its divisors is an integer number (4244423323497).

Almost surely, 2^{21020001221102} is an apocalyptic number.

21020001221102 is a deficient number, since it is larger than the sum of its proper divisors (12935385366874).

21020001221102 is a wasteful number, since it uses less digits than its factorization.

21020001221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808461585442.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21020001221102 its reverse (20112210002012), we get a palindrome (41132211223114).

The spelling of 21020001221102 in words is "twenty-one trillion, twenty billion, one million, two hundred twenty-one thousand, one hundred two".