101001122220 has 96 divisors (see below), whose sum is σ = 303074731008. Its totient is φ = 25066305792.

The previous prime is 101001122179. The next prime is 101001122239. The reversal of 101001122220 is 22221100101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 101001122196 and 101001122205.

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, 937984 + ... + 1040103.

It is an arithmetic number, because the mean of its divisors is an integer number (3157028448).

Almost surely, 2^101001122220 is an apocalyptic number.

101001122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101001122220 is an abundant number, since it is smaller than the sum of its proper divisors (202073608788).

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

101001122220 is a wasteful number, since it uses less digits than its factorization.

101001122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978159 (or 1978157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101001122220 its reverse (22221100101), we get a palindrome (123222222321).

The spelling of 101001122220 in words is "one hundred one billion, one million, one hundred twenty-two thousand, two hundred twenty".