1020451512421 has 32 divisors (see below), whose sum is σ = 1129817880576. Its totient is φ = 913950720000.

The previous prime is 1020451512389. The next prime is 1020451512497. The reversal of 1020451512421 is 1242151540201.

It is a cyclic number.

It is not a de Polignac number, because 1020451512421 - 2⁵ = 1020451512389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020451512421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020451519421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483396156 + ... + 483398266.

It is an arithmetic number, because the mean of its divisors is an integer number (35306808768).

Almost surely, 2^{1020451512421} is an apocalyptic number.

1020451512421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020451512421 is a deficient number, since it is larger than the sum of its proper divisors (109366368155).

1020451512421 is a wasteful number, since it uses less digits than its factorization.

1020451512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173.

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 1020451512421 in words is "one trillion, twenty billion, four hundred fifty-one million, five hundred twelve thousand, four hundred twenty-one".