101131221012 has 24 divisors (see below), whose sum is σ = 243584877312. Its totient is φ = 32622974400.

The previous prime is 101131221011. The next prime is 101131221041. The reversal of 101131221012 is 210122131101.

It is a junction number, because it is equal to n+sod(n) for n = 101131220982 and 101131221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101131221011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135928689 + ... + 135929432.

It is an arithmetic number, because the mean of its divisors is an integer number (10149369888).

Almost surely, 2^101131221012 is an apocalyptic number.

101131221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101131221012 is an abundant number, since it is smaller than the sum of its proper divisors (142453656300).

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

101131221012 is a wasteful number, since it uses less digits than its factorization.

101131221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271858159 (or 271858157 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 101131221012 its reverse (210122131101), we get a palindrome (311253352113).

The spelling of 101131221012 in words is "one hundred one billion, one hundred thirty-one million, two hundred twenty-one thousand, twelve".