1010131221 has 16 divisors (see below), whose sum is σ = 1485794880. Its totient is φ = 605320320.

The previous prime is 1010131217. The next prime is 1010131247. The reversal of 1010131221 is 1221310101.

It is not a de Polignac number, because 1010131221 - 2² = 1010131217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1010131197 and 1010131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010131021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169030 + ... + 174903.

It is an arithmetic number, because the mean of its divisors is an integer number (92862180).

Almost surely, 2^1010131221 is an apocalyptic number.

1010131221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1010131221 is a deficient number, since it is larger than the sum of its proper divisors (475663659).

1010131221 is a wasteful number, since it uses less digits than its factorization.

1010131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344036.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1010131221 is about 31782.5615865053. The cubic root of 1010131221 is about 1003.3657328002.

Adding to 1010131221 its reverse (1221310101), we get a palindrome (2231441322).

It can be divided in two parts, 1010 and 131221, that added together give a palindrome (132231).

The spelling of 1010131221 in words is "one billion, ten million, one hundred thirty-one thousand, two hundred twenty-one".