21130220122 has 32 divisors (see below), whose sum is σ = 34881767424. Its totient is φ = 9520056000.

The previous prime is 21130220117. The next prime is 21130220123. The reversal of 21130220122 is 22102203112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21130220096 and 21130220105.

It is not an unprimeable number, because it can be changed into a prime (21130220123) by changing a digit.

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, 3632088 + ... + 3637900.

It is an arithmetic number, because the mean of its divisors is an integer number (1090055232).

Almost surely, 2^21130220122 is an apocalyptic number.

21130220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21130220122 is a deficient number, since it is larger than the sum of its proper divisors (13751547302).

21130220122 is a wasteful number, since it uses less digits than its factorization.

21130220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21130220122 its reverse (22102203112), we get a palindrome (43232423234).

The spelling of 21130220122 in words is "twenty-one billion, one hundred thirty million, two hundred twenty thousand, one hundred twenty-two".