131221011030 has 32 divisors (see below), whose sum is σ = 314952400224. Its totient is φ = 34989828096.

The previous prime is 131221011029. The next prime is 131221011059. The reversal of 131221011030 is 30110122131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

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, 307254 + ... + 597366.

It is an arithmetic number, because the mean of its divisors is an integer number (9842262507).

Almost surely, 2^131221011030 is an apocalyptic number.

131221011030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221011030 is an abundant number, since it is smaller than the sum of its proper divisors (183731389194).

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

131221011030 is a wasteful number, since it uses less digits than its factorization.

131221011030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305200.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131221011030 its reverse (30110122131), we get a palindrome (161331133161).

The spelling of 131221011030 in words is "one hundred thirty-one billion, two hundred twenty-one million, eleven thousand, thirty".