20101221221122 has 16 divisors (see below), whose sum is σ = 31738942553760. Its totient is φ = 9521579443392.

The previous prime is 20101221221117. The next prime is 20101221221167. The reversal of 20101221221122 is 22112212210102.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 20101221221122.

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, 6186538 + ... + 8858650.

It is an arithmetic number, because the mean of its divisors is an integer number (1983683909610).

Almost surely, 2^{20101221221122} is an apocalyptic number.

20101221221122 is a deficient number, since it is larger than the sum of its proper divisors (11637721332638).

20101221221122 is a wasteful number, since it uses less digits than its factorization.

20101221221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870097.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20101221221122 its reverse (22112212210102), we get a palindrome (42213433431224).

The spelling of 20101221221122 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".