1221585131310 has 16 divisors (see below), whose sum is σ = 2931804315216. Its totient is φ = 325756035008.

The previous prime is 1221585131309. The next prime is 1221585131321. The reversal of 1221585131310 is 131315851221.

It is a super-2 number, since 2×1221585131310² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 20359752159 + ... + 20359752218.

It is an arithmetic number, because the mean of its divisors is an integer number (183237769701).

Almost surely, 2^{1221585131310} is an apocalyptic number.

1221585131310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221585131310 is an abundant number, since it is smaller than the sum of its proper divisors (1710219183906).

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

1221585131310 is a wasteful number, since it uses less digits than its factorization.

1221585131310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40719504387.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 1221585131310 in words is "one trillion, two hundred twenty-one billion, five hundred eighty-five million, one hundred thirty-one thousand, three hundred ten".