211201120020 has 96 divisors (see below), whose sum is σ = 645341155200. Its totient is φ = 51182991360.

The previous prime is 211201120007. The next prime is 211201120027. The reversal of 211201120020 is 20021102112.

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 = 211201119978 and 211201120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201120027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1959864 + ... + 2064816.

It is an arithmetic number, because the mean of its divisors is an integer number (6722303700).

Almost surely, 2^211201120020 is an apocalyptic number.

211201120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211201120020 is an abundant number, since it is smaller than the sum of its proper divisors (434140035180).

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

211201120020 is a wasteful number, since it uses less digits than its factorization.

211201120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108025 (or 108023 counting only the distinct ones).

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

Adding to 211201120020 its reverse (20021102112), we get a palindrome (231222222132).

The spelling of 211201120020 in words is "two hundred eleven billion, two hundred one million, one hundred twenty thousand, twenty".