201111202121020 has 48 divisors (see below), whose sum is σ = 422520611325120. Its totient is φ = 80408849371136.

The previous prime is 201111202121003. The next prime is 201111202121059. The reversal of 201111202121020 is 20121202111102.

It is a junction number, because it is equal to n+sod(n) for n = 201111202120985 and 201111202121003.

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, 841867914 + ... + 842106766.

It is an arithmetic number, because the mean of its divisors is an integer number (8802512735940).

Almost surely, 2^{201111202121020} is an apocalyptic number.

201111202121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111202121020 is an abundant number, since it is smaller than the sum of its proper divisors (221409409204100).

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

201111202121020 is a wasteful number, since it uses less digits than its factorization.

201111202121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257334 (or 257332 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201111202121020 its reverse (20121202111102), we get a palindrome (221232404232122).

The spelling of 201111202121020 in words is "two hundred one trillion, one hundred eleven billion, two hundred two million, one hundred twenty-one thousand, twenty".