10101121221020 has 12 divisors (see below), whose sum is σ = 21212354564184. Its totient is φ = 4040448488400.

The previous prime is 10101121221017. The next prime is 10101121221043. The reversal of 10101121221020 is 2012212110101.

It is a junction number, because it is equal to n+sod(n) for n = 10101121220986 and 10101121221004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252528030506 + ... + 252528030545.

It is an arithmetic number, because the mean of its divisors is an integer number (1767696213682).

Almost surely, 2^{10101121221020} is an apocalyptic number.

10101121221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101121221020 is an abundant number, since it is smaller than the sum of its proper divisors (11111233343164).

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

10101121221020 is a wasteful number, since it uses less digits than its factorization.

10101121221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505056061060 (or 505056061058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10101121221020 its reverse (2012212110101), we get a palindrome (12113333331121).

The spelling of 10101121221020 in words is "ten trillion, one hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".