1021340142420 has 96 divisors (see below), whose sum is σ = 3106987898112. Its totient is φ = 249181943808.

The previous prime is 1021340142379. The next prime is 1021340142457. The reversal of 1021340142420 is 242410431201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5705712 + ... + 5881991.

It is an arithmetic number, because the mean of its divisors is an integer number (32364457272).

Almost surely, 2^{1021340142420} is an apocalyptic number.

1021340142420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021340142420 is an abundant number, since it is smaller than the sum of its proper divisors (2085647755692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021340142420 is a wasteful number, since it uses less digits than its factorization.

1021340142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11587841 (or 11587839 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1021340142420 its reverse (242410431201), we get a palindrome (1263750573621).

The spelling of 1021340142420 in words is "one trillion, twenty-one billion, three hundred forty million, one hundred forty-two thousand, four hundred twenty".