101212210220220 has 144 divisors (see below), whose sum is σ = 349482161613312. Its totient is φ = 23469498011520.

The previous prime is 101212210220137. The next prime is 101212210220279. The reversal of 101212210220220 is 22022012212101.

It is a happy number.

101212210220220 is a `hidden beast` number, since 1 + 0 + 1 + 2 + 1 + 221 + 0 + 220 + 220 = 666.

It is a super-2 number, since 2×101212210220220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 101212210220193 and 101212210220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1111199632 + ... + 1111290711.

It is an arithmetic number, because the mean of its divisors is an integer number (2426959455648).

Almost surely, 2^{101212210220220} is an apocalyptic number.

101212210220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212210220220 is an abundant number, since it is smaller than the sum of its proper divisors (248269951393092).

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

101212210220220 is a wasteful number, since it uses less digits than its factorization.

101212210220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222490392 (or 2222490387 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 101212210220220 its reverse (22022012212101), we get a palindrome (123234222432321).

The spelling of 101212210220220 in words is "one hundred one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, two hundred twenty".