211221124130 has 32 divisors (see below), whose sum is σ = 400349554560. Its totient is φ = 80013467520.

The previous prime is 211221124027. The next prime is 211221124133. The reversal of 211221124130 is 31421122112.

It is a super-2 number, since 2×211221124130² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221124133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348275 + ... + 737385.

It is an arithmetic number, because the mean of its divisors is an integer number (12510923580).

Almost surely, 2^211221124130 is an apocalyptic number.

211221124130 is a deficient number, since it is larger than the sum of its proper divisors (189128430430).

211221124130 is a wasteful number, since it uses less digits than its factorization.

211221124130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391994.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211221124130 its reverse (31421122112), we get a palindrome (242642246242).

The spelling of 211221124130 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twenty-four thousand, one hundred thirty".