212212020440 has 192 divisors, whose sum is σ = 560323059840. Its totient is φ = 72120222720.

The previous prime is 212212020439. The next prime is 212212020479. The reversal of 212212020440 is 44020212212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232943585 + ... + 232944495.

It is an arithmetic number, because the mean of its divisors is an integer number (2918349270).

Almost surely, 2^212212020440 is an apocalyptic number.

212212020440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212212020440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280161529920).

212212020440 is an abundant number, since it is smaller than the sum of its proper divisors (348111039400).

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

212212020440 is a wasteful number, since it uses less digits than its factorization.

212212020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 212212020440 its reverse (44020212212), we get a palindrome (256232232652).

The spelling of 212212020440 in words is "two hundred twelve billion, two hundred twelve million, twenty thousand, four hundred forty".