1021121402403 has 8 divisors (see below), whose sum is σ = 1369847935168. Its totient is φ = 676571235624.

The previous prime is 1021121402401. The next prime is 1021121402407. The reversal of 1021121402403 is 3042041211201.

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

It is not a de Polignac number, because 1021121402403 - 2¹ = 1021121402401 is a prime.

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 1021121402403.

It is not an unprimeable number, because it can be changed into a prime (1021121402401) 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, 1044090925 + ... + 1044091902.

It is an arithmetic number, because the mean of its divisors is an integer number (171230991896).

Almost surely, 2^{1021121402403} is an apocalyptic number.

1021121402403 is a deficient number, since it is larger than the sum of its proper divisors (348726532765).

1021121402403 is a wasteful number, since it uses less digits than its factorization.

1021121402403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088182993.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1021121402403 its reverse (3042041211201), we get a palindrome (4063162613604).

The spelling of 1021121402403 in words is "one trillion, twenty-one billion, one hundred twenty-one million, four hundred two thousand, four hundred three".