211320031223240 has 128 divisors (see below), whose sum is σ = 482218948481760. Its totient is φ = 83335393050624.

The previous prime is 211320031223233. The next prime is 211320031223263. The reversal of 211320031223240 is 42322130023112.

It can be written as a sum of positive squares in 16 ways, for example, as 100149535860676 + 111170495362564 = 10007474^2 + 10543742^2 .

It is a super-2 number, since 2×211320031223240² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1365453704 + ... + 1365608456.

Almost surely, 2^{211320031223240} is an apocalyptic number.

211320031223240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211320031223240 is an abundant number, since it is smaller than the sum of its proper divisors (270898917258520).

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

211320031223240 is a wasteful number, since it uses less digits than its factorization.

211320031223240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156211 (or 156207 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 211320031223240 its reverse (42322130023112), we get a palindrome (253642161246352).

The spelling of 211320031223240 in words is "two hundred eleven trillion, three hundred twenty billion, thirty-one million, two hundred twenty-three thousand, two hundred forty".