10101121011220 has 12 divisors (see below), whose sum is σ = 21212354123604. Its totient is φ = 4040448404480.

The previous prime is 10101121011209. The next prime is 10101121011227. The reversal of 10101121011220 is 2211012110101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1160937291024 + 8940183720196 = 1077468^2 + 2990014^2 .

It is a super-3 number, since 3×10101121011220³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10101121011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101121011227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252528025261 + ... + 252528025300.

It is an arithmetic number, because the mean of its divisors is an integer number (1767696176967).

Almost surely, 2^{10101121011220} is an apocalyptic number.

10101121011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101121011220 is an abundant number, since it is smaller than the sum of its proper divisors (11111233112384).

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

10101121011220 is a wasteful number, since it uses less digits than its factorization.

10101121011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505056050570 (or 505056050568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10101121011220 its reverse (2211012110101), we get a palindrome (12312133121321).

The spelling of 10101121011220 in words is "ten trillion, one hundred one billion, one hundred twenty-one million, eleven thousand, two hundred twenty".