20021220011201 has 16 divisors (see below), whose sum is σ = 20381030258688. Its totient is φ = 19664614368000.

The previous prime is 20021220011129. The next prime is 20021220011239. The reversal of 20021220011201 is 10211002212002.

It is a cyclic number.

It is not a de Polignac number, because 20021220011201 - 2¹⁸ = 20021219749057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021220011701) 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, 115882586 + ... + 116055228.

It is an arithmetic number, because the mean of its divisors is an integer number (1273814391168).

Almost surely, 2^{20021220011201} is an apocalyptic number.

It is an amenable number.

20021220011201 is a deficient number, since it is larger than the sum of its proper divisors (359810247487).

20021220011201 is a wasteful number, since it uses less digits than its factorization.

20021220011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181912.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021220011201 its reverse (10211002212002), we get a palindrome (30232222223203).

The spelling of 20021220011201 in words is "twenty trillion, twenty-one billion, two hundred twenty million, eleven thousand, two hundred one".