10101221121220 has 24 divisors (see below), whose sum is σ = 21896840625408. Its totient is φ = 3910150111200.

The previous prime is 10101221121197. The next prime is 10101221121221. The reversal of 10101221121220 is 2212112210101.

It is a junction number, because it is equal to n+sod(n) for n = 10101221121194 and 10101221121203.

It is not an unprimeable number, because it can be changed into a prime (10101221121221) 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, 8146145446 + ... + 8146146685.

It is an arithmetic number, because the mean of its divisors is an integer number (912368359392).

Almost surely, 2^{10101221121220} is an apocalyptic number.

10101221121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101221121220 is an abundant number, since it is smaller than the sum of its proper divisors (11795619504188).

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

10101221121220 is a wasteful number, since it uses less digits than its factorization.

10101221121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16292292171 (or 16292292169 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10101221121220 its reverse (2212112210101), we get a palindrome (12313333331321).

The spelling of 10101221121220 in words is "ten trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty".