211221132130 has 32 divisors (see below), whose sum is σ = 390316349808. Its totient is φ = 82248883200.

The previous prime is 211221132121. The next prime is 211221132229. The reversal of 211221132130 is 31231122112.

It can be written as a sum of positive squares in 8 ways, for example, as 557573769 + 210663558361 = 23613^2 + 458981^2 .

It is a super-2 number, since 2×211221132130² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221132098 and 211221132107.

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, 369747 + ... + 747766.

Almost surely, 2^211221132130 is an apocalyptic number.

211221132130 is a deficient number, since it is larger than the sum of its proper divisors (179095217678).

211221132130 is a wasteful number, since it uses less digits than its factorization.

211221132130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118022.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211221132130 its reverse (31231122112), we get a palindrome (242452254242).

The spelling of 211221132130 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred thirty-two thousand, one hundred thirty".