21120120221002 has 16 divisors (see below), whose sum is σ = 34708523758272. Its totient is φ = 9558852692320.

The previous prime is 21120120220981. The next prime is 21120120221003. The reversal of 21120120221002 is 20012202102112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21120120221003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060092438 + ... + 2060102689.

It is an arithmetic number, because the mean of its divisors is an integer number (2169282734892).

Almost surely, 2^{21120120221002} is an apocalyptic number.

21120120221002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120120221002 is a deficient number, since it is larger than the sum of its proper divisors (13588403537270).

21120120221002 is a wasteful number, since it uses less digits than its factorization.

21120120221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120195373.

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

Adding to 21120120221002 its reverse (20012202102112), we get a palindrome (41132322323114).

The spelling of 21120120221002 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, two hundred twenty-one thousand, two".