101021544220 has 24 divisors (see below), whose sum is σ = 223310782800. Its totient is φ = 38281848192.

The previous prime is 101021544203. The next prime is 101021544257. The reversal of 101021544220 is 22445120101.

It is a junction number, because it is equal to n+sod(n) for n = 101021544191 and 101021544200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132922705 + ... + 132923464.

It is an arithmetic number, because the mean of its divisors is an integer number (9304615950).

Almost surely, 2^101021544220 is an apocalyptic number.

101021544220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101021544220 is an abundant number, since it is smaller than the sum of its proper divisors (122289238580).

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

101021544220 is a wasteful number, since it uses less digits than its factorization.

101021544220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265846197 (or 265846195 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 101021544220 its reverse (22445120101), we get a palindrome (123466664321).

The spelling of 101021544220 in words is "one hundred one billion, twenty-one million, five hundred forty-four thousand, two hundred twenty".