21220020120201 has 32 divisors (see below), whose sum is σ = 34008122032128. Its totient is φ = 11513166275520.

The previous prime is 21220020120193. The next prime is 21220020120209. The reversal of 21220020120201 is 10202102002212.

It is an interprime number because it is at equal distance from previous prime (21220020120193) and next prime (21220020120209).

It is not a de Polignac number, because 21220020120201 - 2³ = 21220020120193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220020120209) 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, 307475281 + ... + 307544286.

It is an arithmetic number, because the mean of its divisors is an integer number (1062753813504).

Almost surely, 2^{21220020120201} is an apocalyptic number.

21220020120201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21220020120201 is a deficient number, since it is larger than the sum of its proper divisors (12788101911927).

21220020120201 is a wasteful number, since it uses less digits than its factorization.

21220020120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615019661.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220020120201 its reverse (10202102002212), we get a palindrome (31422122122413).

The spelling of 21220020120201 in words is "twenty-one trillion, two hundred twenty billion, twenty million, one hundred twenty thousand, two hundred one".