211243022040 has 64 divisors (see below), whose sum is σ = 671007252960. Its totient is φ = 53017856000.

The previous prime is 211243022027. The next prime is 211243022069. The reversal of 211243022040 is 40220342112.

It is a super-2 number, since 2×211243022040² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211243021998 and 211243022016.

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, 51773211 + ... + 51777290.

Almost surely, 2^211243022040 is an apocalyptic number.

211243022040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211243022040 is an abundant number, since it is smaller than the sum of its proper divisors (459764230920).

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

211243022040 is a wasteful number, since it uses less digits than its factorization.

211243022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103550532 (or 103550528 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 211243022040 its reverse (40220342112), we get a palindrome (251463364152).

The spelling of 211243022040 in words is "two hundred eleven billion, two hundred forty-three million, twenty-two thousand, forty".