21221121000122 has 16 divisors (see below), whose sum is σ = 32133615766560. Its totient is φ = 10509943164048.

The previous prime is 21221121000091. The next prime is 21221121000139. The reversal of 21221121000122 is 22100012112212.

It is a self number, because there is not a number n which added to its sum of digits gives 21221121000122.

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, 5302472 + ... + 8399907.

It is an arithmetic number, because the mean of its divisors is an integer number (2008350985410).

Almost surely, 2^{21221121000122} is an apocalyptic number.

21221121000122 is a deficient number, since it is larger than the sum of its proper divisors (10912494766438).

21221121000122 is a wasteful number, since it uses less digits than its factorization.

21221121000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13709725.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221121000122 its reverse (22100012112212), we get a palindrome (43321133112334).

The spelling of 21221121000122 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two", and thus it is an aban number.