201022111020 has 48 divisors (see below), whose sum is σ = 595971438048. Its totient is φ = 50452608000.

The previous prime is 201022111001. The next prime is 201022111049. The reversal of 201022111020 is 20111220102.

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 = 201022110987 and 201022111005.

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, 98539231 + ... + 98541270.

It is an arithmetic number, because the mean of its divisors is an integer number (12416071626).

Almost surely, 2^201022111020 is an apocalyptic number.

201022111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201022111020 is an abundant number, since it is smaller than the sum of its proper divisors (394949327028).

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

201022111020 is a wasteful number, since it uses less digits than its factorization.

201022111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197080530 (or 197080528 counting only the distinct ones).

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

Adding to 201022111020 its reverse (20111220102), we get a palindrome (221133331122).

The spelling of 201022111020 in words is "two hundred one billion, twenty-two million, one hundred eleven thousand, twenty".