1024210220421 has 4 divisors (see below), whose sum is σ = 1365613627232. Its totient is φ = 682806813612.

The previous prime is 1024210220353. The next prime is 1024210220431. The reversal of 1024210220421 is 1240220124201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1024210220421 - 2¹³ = 1024210212229 is a prime.

It is a super-4 number, since 4×1024210220421⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024210220431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170701703401 + ... + 170701703406.

It is an arithmetic number, because the mean of its divisors is an integer number (341403406808).

Almost surely, 2^{1024210220421} is an apocalyptic number.

It is an amenable number.

1024210220421 is a deficient number, since it is larger than the sum of its proper divisors (341403406811).

1024210220421 is an equidigital number, since it uses as much as digits as its factorization.

1024210220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341403406810.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1024210220421 its reverse (1240220124201), we get a palindrome (2264430344622).

The spelling of 1024210220421 in words is "one trillion, twenty-four billion, two hundred ten million, two hundred twenty thousand, four hundred twenty-one".