20101121122220 has 24 divisors (see below), whose sum is σ = 42212469953808. Its totient is φ = 8040426430400.

The previous prime is 20101121122219. The next prime is 20101121122223. The reversal of 20101121122220 is 2222112110102.

It is not an unprimeable number, because it can be changed into a prime (20101121122223) 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, 7508975 + ... + 9827865.

It is an arithmetic number, because the mean of its divisors is an integer number (1758852914742).

Almost surely, 2^{20101121122220} is an apocalyptic number.

20101121122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101121122220 is an abundant number, since it is smaller than the sum of its proper divisors (22111348831588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101121122220 is a wasteful number, since it uses less digits than its factorization.

20101121122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752321 (or 2752319 counting only the distinct ones).

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

Adding to 20101121122220 its reverse (2222112110102), we get a palindrome (22323233232322).

The spelling of 20101121122220 in words is "twenty trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".