1021121343231 has 16 divisors (see below), whose sum is σ = 1485797427840. Its totient is φ = 618640578720.

The previous prime is 1021121343181. The next prime is 1021121343241. The reversal of 1021121343231 is 1323431211201.

It is not a de Polignac number, because 1021121343231 - 2⁶ = 1021121343167 is a prime.

It is a super-2 number, since 2×1021121343231² (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 (1021121343241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5427136 + ... + 5612133.

It is an arithmetic number, because the mean of its divisors is an integer number (92862339240).

Almost surely, 2^{1021121343231} is an apocalyptic number.

1021121343231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021121343231 is a deficient number, since it is larger than the sum of its proper divisors (464676084609).

1021121343231 is a wasteful number, since it uses less digits than its factorization.

1021121343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042086.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1021121343231 its reverse (1323431211201), we get a palindrome (2344552554432).

The spelling of 1021121343231 in words is "one trillion, twenty-one billion, one hundred twenty-one million, three hundred forty-three thousand, two hundred thirty-one".