211202431220 has 24 divisors (see below), whose sum is σ = 483845570208. Its totient is φ = 76800884000.

The previous prime is 211202431217. The next prime is 211202431273. The reversal of 211202431220 is 22134202112.

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

It is a junction number, because it is equal to n+sod(n) for n = 211202431192 and 211202431201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480005306 + ... + 480005745.

It is an arithmetic number, because the mean of its divisors is an integer number (20160232092).

Almost surely, 2^211202431220 is an apocalyptic number.

211202431220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202431220 is an abundant number, since it is smaller than the sum of its proper divisors (272643138988).

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

211202431220 is a wasteful number, since it uses less digits than its factorization.

211202431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960011071 (or 960011069 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211202431220 its reverse (22134202112), we get a palindrome (233336633332).

The spelling of 211202431220 in words is "two hundred eleven billion, two hundred two million, four hundred thirty-one thousand, two hundred twenty".