21201110121002 has 16 divisors (see below), whose sum is σ = 36344864236032. Its totient is φ = 9086164044720.

The previous prime is 21201110120999. The next prime is 21201110121011. The reversal of 21201110121002 is 20012101110212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3390023 + ... + 7341285.

It is an arithmetic number, because the mean of its divisors is an integer number (2271554014752).

Almost surely, 2^{21201110121002} is an apocalyptic number.

21201110121002 is a deficient number, since it is larger than the sum of its proper divisors (15143754115030).

21201110121002 is a wasteful number, since it uses less digits than its factorization.

21201110121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334533.

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

Adding to 21201110121002 its reverse (20012101110212), we get a palindrome (41213211231214).

The spelling of 21201110121002 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred twenty-one thousand, two".