1011021212231 has 16 divisors (see below), whose sum is σ = 1079552966400. Its totient is φ = 944039510208.

The previous prime is 1011021211957. The next prime is 1011021212233. The reversal of 1011021212231 is 1322121201101.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011021212231 is a prime.

It is a super-2 number, since 2×1011021212231² (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 (1011021212233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1773830 + ... + 2273436.

It is an arithmetic number, because the mean of its divisors is an integer number (67472060400).

Almost surely, 2^{1011021212231} is an apocalyptic number.

1011021212231 is a deficient number, since it is larger than the sum of its proper divisors (68531754169).

1011021212231 is a wasteful number, since it uses less digits than its factorization.

1011021212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501158.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1011021212231 its reverse (1322121201101), we get a palindrome (2333142413332).

The spelling of 1011021212231 in words is "one trillion, eleven billion, twenty-one million, two hundred twelve thousand, two hundred thirty-one".