211220302104 has 64 divisors (see below), whose sum is σ = 670540646400. Its totient is φ = 60348657312.

The previous prime is 211220302099. The next prime is 211220302121. The reversal of 211220302104 is 401203022112.

It is a happy number.

It is a super-2 number, since 2×211220302104² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 69846472 + ... + 69849495.

It is an arithmetic number, because the mean of its divisors is an integer number (10477197600).

Almost surely, 2^211220302104 is an apocalyptic number.

211220302104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

211220302104 is an abundant number, since it is smaller than the sum of its proper divisors (459320344296).

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

211220302104 is a wasteful number, since it uses less digits than its factorization.

211220302104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139695989 (or 139695979 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 211220302104 its reverse (401203022112), we get a palindrome (612423324216).

The spelling of 211220302104 in words is "two hundred eleven billion, two hundred twenty million, three hundred two thousand, one hundred four".