1011212301231 has 64 divisors (see below), whose sum is σ = 1741439900160. Its totient is φ = 573131220480.

The previous prime is 1011212301227. The next prime is 1011212301233. The reversal of 1011212301231 is 1321032121101.

1011212301231 is a `hidden beast` number, since 10 + 1 + 121 + 2 + 301 + 231 = 666.

It is not a de Polignac number, because 1011212301231 - 2² = 1011212301227 is a prime.

It is a super-2 number, since 2×1011212301231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212301233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 154860 + ... + 1430526.

It is an arithmetic number, because the mean of its divisors is an integer number (27209998440).

Almost surely, 2^{1011212301231} is an apocalyptic number.

1011212301231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1011212301231 is a deficient number, since it is larger than the sum of its proper divisors (730227598929).

1011212301231 is a wasteful number, since it uses less digits than its factorization.

1011212301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275861 (or 1275855 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1011212301231 its reverse (1321032121101), we get a palindrome (2332244422332).

The spelling of 1011212301231 in words is "one trillion, eleven billion, two hundred twelve million, three hundred one thousand, two hundred thirty-one".