1021121541403 has 8 divisors (see below), whose sum is σ = 1022828702720. Its totient is φ = 1019415044520.

The previous prime is 1021121541397. The next prime is 1021121541449. The reversal of 1021121541403 is 3041451211201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021121541403 - 2⁹ = 1021121540891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021121541203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2959126 + ... + 3286132.

It is an arithmetic number, because the mean of its divisors is an integer number (127853587840).

Almost surely, 2^{1021121541403} is an apocalyptic number.

1021121541403 is a deficient number, since it is larger than the sum of its proper divisors (1707161317).

1021121541403 is an equidigital number, since it uses as much as digits as its factorization.

1021121541403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332217.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 1021121541403 its reverse (3041451211201), we get a palindrome (4062572752604).

The spelling of 1021121541403 in words is "one trillion, twenty-one billion, one hundred twenty-one million, five hundred forty-one thousand, four hundred three".