1121201011021 has 48 divisors (see below), whose sum is σ = 1421613452160. Its totient is φ = 865495238400.

The previous prime is 1121201010991. The next prime is 1121201011039. The reversal of 1121201011021 is 1201101021211.

It is a happy number.

It is not a de Polignac number, because 1121201011021 - 2¹⁹ = 1121200486733 is a prime.

It is a super-2 number, since 2×1121201011021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121201010992 and 1121201011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121201011321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11173171 + ... + 11273071.

It is an arithmetic number, because the mean of its divisors is an integer number (29616946920).

Almost surely, 2^{1121201011021} is an apocalyptic number.

It is an amenable number.

1121201011021 is a deficient number, since it is larger than the sum of its proper divisors (300412441139).

1121201011021 is a wasteful number, since it uses less digits than its factorization.

1121201011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100166 (or 100153 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121201011021 its reverse (1201101021211), we get a palindrome (2322302032232).

The spelling of 1121201011021 in words is "one trillion, one hundred twenty-one billion, two hundred one million, eleven thousand, twenty-one".