211223120130 has 192 divisors, whose sum is σ = 604665959040. Its totient is φ = 50731699200.

The previous prime is 211223120113. The next prime is 211223120131. The reversal of 211223120130 is 31021322112.

211223120130 is a `hidden beast` number, since 211 + 223 + 1 + 201 + 30 = 666.

It is a super-2 number, since 2×211223120130² (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 not an unprimeable number, because it can be changed into a prime (211223120131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123593716 + ... + 123595424.

It is an arithmetic number, because the mean of its divisors is an integer number (3149301870).

Almost surely, 2^211223120130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211223120130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302332979520).

211223120130 is an abundant number, since it is smaller than the sum of its proper divisors (393442838910).

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

211223120130 is a wasteful number, since it uses less digits than its factorization.

211223120130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211223120130 its reverse (31021322112), we get a palindrome (242244442242).

The spelling of 211223120130 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred twenty thousand, one hundred thirty".