101212112220 has 48 divisors (see below), whose sum is σ = 300064147488. Its totient is φ = 25402255360.

The previous prime is 101212112213. The next prime is 101212112249. The reversal of 101212112220 is 22211212101.

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 101212112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49612761 + ... + 49614800.

It is an arithmetic number, because the mean of its divisors is an integer number (6251336406).

Almost surely, 2^101212112220 is an apocalyptic number.

101212112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212112220 is an abundant number, since it is smaller than the sum of its proper divisors (198852035268).

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

101212112220 is a wasteful number, since it uses less digits than its factorization.

101212112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99227590 (or 99227588 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101212112220 its reverse (22211212101), we get a palindrome (123423324321).

The spelling of 101212112220 in words is "one hundred one billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty".