101121011220 has 48 divisors (see below), whose sum is σ = 284703164928. Its totient is φ = 26816618880.

The previous prime is 101121011149. The next prime is 101121011239. The reversal of 101121011220 is 22110121101.

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 = 101121011196 and 101121011205.

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, 4644804 + ... + 4666523.

It is an arithmetic number, because the mean of its divisors is an integer number (5931315936).

Almost surely, 2^101121011220 is an apocalyptic number.

101121011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101121011220 is an abundant number, since it is smaller than the sum of its proper divisors (183582153708).

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

101121011220 is a wasteful number, since it uses less digits than its factorization.

101121011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9311520 (or 9311518 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101121011220 its reverse (22110121101), we get a palindrome (123231132321).

The spelling of 101121011220 in words is "one hundred one billion, one hundred twenty-one million, eleven thousand, two hundred twenty".