1021110232121 has 12 divisors (see below), whose sum is σ = 1189624605840. Its totient is φ = 873909184680.

The previous prime is 1021110232099. The next prime is 1021110232159. The reversal of 1021110232121 is 1212320111201.

It is a happy number.

It is not a de Polignac number, because 1021110232121 - 2¹⁸ = 1021109969977 is a prime.

It is a super-2 number, since 2×1021110232121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021110232121.

It is not an unprimeable number, because it can be changed into a prime (1021110232171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15778775 + ... + 15843356.

It is an arithmetic number, because the mean of its divisors is an integer number (99135383820).

Almost surely, 2^{1021110232121} is an apocalyptic number.

It is an amenable number.

1021110232121 is a deficient number, since it is larger than the sum of its proper divisors (168514373719).

1021110232121 is an equidigital number, since it uses as much as digits as its factorization.

1021110232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31622804 (or 31622797 counting only the distinct ones).

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

Adding to 1021110232121 its reverse (1212320111201), we get a palindrome (2233430343322).

The spelling of 1021110232121 in words is "one trillion, twenty-one billion, one hundred ten million, two hundred thirty-two thousand, one hundred twenty-one".