1021132121 has 4 divisors (see below), whose sum is σ = 1021404432. Its totient is φ = 1020859812.

The previous prime is 1021132111. The next prime is 1021132141. The reversal of 1021132121 is 1212311201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1212311201 = 151 ⋅8028551.

It is a cyclic number.

It is not a de Polignac number, because 1021132121 - 2¹⁴ = 1021115737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021132096 and 1021132105.

It is not an unprimeable number, because it can be changed into a prime (1021132111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130451 + ... + 138056.

It is an arithmetic number, because the mean of its divisors is an integer number (255351108).

Almost surely, 2^1021132121 is an apocalyptic number.

It is an amenable number.

1021132121 is a deficient number, since it is larger than the sum of its proper divisors (272311).

1021132121 is an equidigital number, since it uses as much as digits as its factorization.

1021132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272310.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1021132121 is about 31955.1579717579. The cubic root of 1021132121 is about 1006.9949962722.

Adding to 1021132121 its reverse (1212311201), we get a palindrome (2233443322).

The spelling of 1021132121 in words is "one billion, twenty-one million, one hundred thirty-two thousand, one hundred twenty-one".