220421016501 has 32 divisors (see below), whose sum is σ = 348456960000. Its totient is φ = 121279213440.

The previous prime is 220421016463. The next prime is 220421016509. The reversal of 220421016501 is 105610124022.

It is not a de Polignac number, because 220421016501 - 2¹³ = 220421008309 is a prime.

It is a super-2 number, since 2×220421016501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220421016509) 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, 721176 + ... + 980273.

It is an arithmetic number, because the mean of its divisors is an integer number (10889280000).

Almost surely, 2^220421016501 is an apocalyptic number.

220421016501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220421016501 is a deficient number, since it is larger than the sum of its proper divisors (128035943499).

220421016501 is a wasteful number, since it uses less digits than its factorization.

220421016501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701689.

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 220421016501 in words is "two hundred twenty billion, four hundred twenty-one million, sixteen thousand, five hundred one".