1221331132130 has 16 divisors (see below), whose sum is σ = 2198421490104. Its totient is φ = 488526796800.

The previous prime is 1221331132127. The next prime is 1221331132163. The reversal of 1221331132130 is 312311331221.

It can be written as a sum of positive squares in 4 ways, for example, as 779987482561 + 441343649569 = 883169^2 + 664337^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221331132096 and 1221331132105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263330 + ... + 1584930.

Almost surely, 2^{1221331132130} is an apocalyptic number.

1221331132130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221331132130 is a deficient number, since it is larger than the sum of its proper divisors (977090357974).

1221331132130 is a wasteful number, since it uses less digits than its factorization.

1221331132130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414021.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1221331132130 its reverse (312311331221), we get a palindrome (1533642463351).

The spelling of 1221331132130 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, one hundred thirty-two thousand, one hundred thirty".