101221222020 has 24 divisors (see below), whose sum is σ = 283419421824. Its totient is φ = 26992325856.

The previous prime is 101221222007. The next prime is 101221222073. The reversal of 101221222020 is 20222122101.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 843510124 + ... + 843510243.

It is an arithmetic number, because the mean of its divisors is an integer number (11809142576).

Almost surely, 2^101221222020 is an apocalyptic number.

101221222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221222020 is an abundant number, since it is smaller than the sum of its proper divisors (182198199804).

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

101221222020 is a wasteful number, since it uses less digits than its factorization.

101221222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687020379 (or 1687020377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 101221222020 its reverse (20222122101), we get a palindrome (121443344121).

The spelling of 101221222020 in words is "one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty".