20121122221022 has 64 divisors (see below), whose sum is σ = 34059801176064. Its totient is φ = 8863388751360.

The previous prime is 20121122221003. The next prime is 20121122221027. The reversal of 20121122221022 is 22012222112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121122220985 and 20121122221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121122221027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403276697 + ... + 403326587.

It is an arithmetic number, because the mean of its divisors is an integer number (532184393376).

Almost surely, 2^{20121122221022} is an apocalyptic number.

20121122221022 is a deficient number, since it is larger than the sum of its proper divisors (13938678955042).

20121122221022 is a wasteful number, since it uses less digits than its factorization.

20121122221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60953.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20121122221022 its reverse (22012222112102), we get a palindrome (42133344333124).

The spelling of 20121122221022 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-two".