201121110111020 has 48 divisors (see below), whose sum is σ = 461899182671136. Its totient is φ = 72952567680000.

The previous prime is 201121110110993. The next prime is 201121110111041. The reversal of 201121110111020 is 20111011121102.

201121110111020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 201121110110986 and 201121110111004.

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, 1139795651 + ... + 1139972090.

It is an arithmetic number, because the mean of its divisors is an integer number (9622899638982).

Almost surely, 2^{201121110111020} is an apocalyptic number.

201121110111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121110111020 is an abundant number, since it is smaller than the sum of its proper divisors (260778072560116).

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

201121110111020 is a wasteful number, since it uses less digits than its factorization.

201121110111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279768162 (or 2279768160 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201121110111020 its reverse (20111011121102), we get a palindrome (221232121232122).

The spelling of 201121110111020 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, twenty".