10220415656021 has 4 divisors (see below), whose sum is σ = 10220470994700. Its totient is φ = 10220360317344.

The previous prime is 10220415655999. The next prime is 10220415656089. The reversal of 10220415656021 is 12065651402201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3722530336996 + 6497885319025 = 1929386^2 + 2549095^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220415656021 - 2²² = 10220411461717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220415652021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27391376 + ... + 27761993.

It is an arithmetic number, because the mean of its divisors is an integer number (2555117748675).

Almost surely, 2^{10220415656021} is an apocalyptic number.

It is an amenable number.

10220415656021 is a deficient number, since it is larger than the sum of its proper divisors (55338679).

10220415656021 is an equidigital number, since it uses as much as digits as its factorization.

10220415656021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55338678.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 10220415656021 in words is "ten trillion, two hundred twenty billion, four hundred fifteen million, six hundred fifty-six thousand, twenty-one".