21121110111002 has 8 divisors (see below), whose sum is σ = 34561816545312. Its totient is φ = 9600504595900.

The previous prime is 21121110110999. The next prime is 21121110111047. The reversal of 21121110111002 is 20011101112112.

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

It is a super-2 number, since 2×21121110111002² (a number of 27 digits) contains 22 as substring.

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, 480025229774 + ... + 480025229817.

It is an arithmetic number, because the mean of its divisors is an integer number (4320227068164).

Almost surely, 2^{21121110111002} is an apocalyptic number.

21121110111002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121110111002 is a deficient number, since it is larger than the sum of its proper divisors (13440706434310).

21121110111002 is a wasteful number, since it uses less digits than its factorization.

21121110111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960050459604.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21121110111002 its reverse (20011101112112), we get a palindrome (41132211223114).

The spelling of 21121110111002 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, two".