1021131000421 has 16 divisors (see below), whose sum is σ = 1204834475008. Its totient is φ = 846892972800.

The previous prime is 1021131000401. The next prime is 1021131000443. The reversal of 1021131000421 is 1240001311201.

It is not a de Polignac number, because 1021131000421 - 2¹⁹ = 1021130476133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021131000395 and 1021131000404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021131000401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1095451 + ... + 1800631.

It is an arithmetic number, because the mean of its divisors is an integer number (75302154688).

Almost surely, 2^{1021131000421} is an apocalyptic number.

It is an amenable number.

1021131000421 is a deficient number, since it is larger than the sum of its proper divisors (183703474587).

1021131000421 is an equidigital number, since it uses as much as digits as its factorization.

1021131000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711892.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1021131000421 its reverse (1240001311201), we get a palindrome (2261132311622).

The spelling of 1021131000421 in words is "one trillion, twenty-one billion, one hundred thirty-one million, four hundred twenty-one", and thus it is an aban number.