211220301040 has 40 divisors (see below), whose sum is σ = 561242515680. Its totient is φ = 72418388736.

The previous prime is 211220300999. The next prime is 211220301113. The reversal of 211220301040 is 40103022112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×211220301040² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188588995 + ... + 188590114.

It is an arithmetic number, because the mean of its divisors is an integer number (14031062892).

Almost surely, 2^211220301040 is an apocalyptic number.

211220301040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220301040 is an abundant number, since it is smaller than the sum of its proper divisors (350022214640).

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

211220301040 is a wasteful number, since it uses less digits than its factorization.

211220301040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377179129 (or 377179123 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 211220301040 its reverse (40103022112), we get a palindrome (251323323152).

The spelling of 211220301040 in words is "two hundred eleven billion, two hundred twenty million, three hundred one thousand, forty".