21121110221002 has 32 divisors (see below), whose sum is σ = 34903859402880. Its totient is φ = 9505527467520.

The previous prime is 21121110220949. The next prime is 21121110221033. The reversal of 21121110221002 is 20012201112112.

It is a super-2 number, since 2×21121110221002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11356374 + ... + 13084702.

It is an arithmetic number, because the mean of its divisors is an integer number (1090745606340).

Almost surely, 2^{21121110221002} is an apocalyptic number.

21121110221002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121110221002 is a deficient number, since it is larger than the sum of its proper divisors (13782749181878).

21121110221002 is a wasteful number, since it uses less digits than its factorization.

21121110221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733838.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121110221002 its reverse (20012201112112), we get a palindrome (41133311333114).

The spelling of 21121110221002 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, two".