131221031310302 has 32 divisors (see below), whose sum is σ = 198206816372352. Its totient is φ = 65153790006624.

The previous prime is 131221031310287. The next prime is 131221031310319. The reversal of 131221031310302 is 203013130122131.

It is a super-2 number, since 2×131221031310302² (a number of 29 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 15 ways as a sum of consecutive naturals, for example, 281011088 + ... + 281477660.

It is an arithmetic number, because the mean of its divisors is an integer number (6193963011636).

Almost surely, 2^{131221031310302} is an apocalyptic number.

131221031310302 is a deficient number, since it is larger than the sum of its proper divisors (66985785062050).

131221031310302 is a wasteful number, since it uses less digits than its factorization.

131221031310302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468392.

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

Adding to 131221031310302 its reverse (203013130122131), we get a palindrome (334234161432433).

The spelling of 131221031310302 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, thirty-one million, three hundred ten thousand, three hundred two".