211242131420 has 48 divisors (see below), whose sum is σ = 444425335200. Its totient is φ = 84341391360.

The previous prime is 211242131407. The next prime is 211242131467. The reversal of 211242131420 is 24131242112.

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, 54427880 + ... + 54431760.

It is an arithmetic number, because the mean of its divisors is an integer number (9258861150).

Almost surely, 2^211242131420 is an apocalyptic number.

211242131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211242131420 is an abundant number, since it is smaller than the sum of its proper divisors (233183203780).

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

211242131420 is a wasteful number, since it uses less digits than its factorization.

211242131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198 (or 8196 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 211242131420 its reverse (24131242112), we get a palindrome (235373373532).

The spelling of 211242131420 in words is "two hundred eleven billion, two hundred forty-two million, one hundred thirty-one thousand, four hundred twenty".