10078220421 has 16 divisors (see below), whose sum is σ = 14957524800. Its totient is φ = 6706741104.

The previous prime is 10078220419. The next prime is 10078220423. The reversal of 10078220421 is 12402287001.

10078220421 is a `hidden beast` number, since 10 + 0 + 7 + 8 + 220 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (10078220419) and next prime (10078220423).

It is not a de Polignac number, because 10078220421 - 2¹ = 10078220419 is a prime.

It is a super-4 number, since 4×10078220421⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10078220423) 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, 320031 + ... + 350108.

It is an arithmetic number, because the mean of its divisors is an integer number (934845300).

Almost surely, 2^10078220421 is an apocalyptic number.

It is an amenable number.

10078220421 is a deficient number, since it is larger than the sum of its proper divisors (4879304379).

10078220421 is an equidigital number, since it uses as much as digits as its factorization.

10078220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670705 (or 670699 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The spelling of 10078220421 in words is "ten billion, seventy-eight million, two hundred twenty thousand, four hundred twenty-one".