201220101021020 has 48 divisors (see below), whose sum is σ = 425906089943040. Its totient is φ = 79851160759104.

The previous prime is 201220101020971. The next prime is 201220101021041. The reversal of 201220101021020 is 20120101022102.

It is a junction number, because it is equal to n+sod(n) for n = 201220101020986 and 201220101021004.

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, 64118891 + ... + 67183869.

It is an arithmetic number, because the mean of its divisors is an integer number (8873043540480).

Almost surely, 2^{201220101021020} is an apocalyptic number.

201220101021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220101021020 is an abundant number, since it is smaller than the sum of its proper divisors (224685988922020).

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

201220101021020 is a wasteful number, since it uses less digits than its factorization.

201220101021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090962 (or 3090960 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201220101021020 its reverse (20120101022102), we get a palindrome (221340202043122).

The spelling of 201220101021020 in words is "two hundred one trillion, two hundred twenty billion, one hundred one million, twenty-one thousand, twenty".