21120220211002 has 16 divisors (see below), whose sum is σ = 34560522748224. Its totient is φ = 9600054984000.

The previous prime is 21120220210997. The next prime is 21120220211033. The reversal of 21120220211002 is 20011202202112.

It is a happy number.

It is a super-2 number, since 2×21120220211002² (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 7 ways as a sum of consecutive naturals, for example, 2782627 + ... + 7069897.

It is an arithmetic number, because the mean of its divisors is an integer number (2160032671764).

Almost surely, 2^{21120220211002} is an apocalyptic number.

21120220211002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120220211002 is a deficient number, since it is larger than the sum of its proper divisors (13440302537222).

21120220211002 is a wasteful number, since it uses less digits than its factorization.

21120220211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511205.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120220211002 its reverse (20011202202112), we get a palindrome (41131422413114).

The spelling of 21120220211002 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, two hundred eleven thousand, two".