101211302220 has 144 divisors (see below), whose sum is σ = 329854129920. Its totient is φ = 23120366976.

The previous prime is 101211302219. The next prime is 101211302279. The reversal of 101211302220 is 22203112101.

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 101211302220.

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, 5479761 + ... + 5498199.

It is an arithmetic number, because the mean of its divisors is an integer number (2290653680).

Almost surely, 2^101211302220 is an apocalyptic number.

101211302220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101211302220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164927064960).

101211302220 is an abundant number, since it is smaller than the sum of its proper divisors (228642827700).

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

101211302220 is a wasteful number, since it uses less digits than its factorization.

101211302220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20332 (or 20323 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 101211302220 its reverse (22203112101), we get a palindrome (123414414321).

The spelling of 101211302220 in words is "one hundred one billion, two hundred eleven million, three hundred two thousand, two hundred twenty".