101212011011220 has 96 divisors (see below), whose sum is σ = 298151770081536. Its totient is φ = 25619915750400.

The previous prime is 101212011011173. The next prime is 101212011011339. The reversal of 101212011011220 is 22110110212101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101212011011220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 555896736 + ... + 556078775.

It is an arithmetic number, because the mean of its divisors is an integer number (3105747605016).

Almost surely, 2^{101212011011220} is an apocalyptic number.

101212011011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212011011220 is an abundant number, since it is smaller than the sum of its proper divisors (196939759070316).

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

101212011011220 is a wasteful number, since it uses less digits than its factorization.

101212011011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111975601 (or 1111975599 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101212011011220 its reverse (22110110212101), we get a palindrome (123322121223321).

The spelling of 101212011011220 in words is "one hundred one trillion, two hundred twelve billion, eleven million, eleven thousand, two hundred twenty".