1012131312221 has 16 divisors (see below), whose sum is σ = 1128522067200. Its totient is φ = 902817577728.

The previous prime is 1012131312217. The next prime is 1012131312223. The reversal of 1012131312221 is 1222131312101.

It is a cyclic number.

It is not a de Polignac number, because 1012131312221 - 2² = 1012131312217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012131312193 and 1012131312202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012131312223) 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, 11831561 + ... + 11916798.

It is an arithmetic number, because the mean of its divisors is an integer number (70532629200).

Almost surely, 2^{1012131312221} is an apocalyptic number.

It is an amenable number.

1012131312221 is a deficient number, since it is larger than the sum of its proper divisors (116390754979).

1012131312221 is a wasteful number, since it uses less digits than its factorization.

1012131312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23748508.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1012131312221 its reverse (1222131312101), we get a palindrome (2234262624322).

The spelling of 1012131312221 in words is "one trillion, twelve billion, one hundred thirty-one million, three hundred twelve thousand, two hundred twenty-one".