21220011012201 has 16 divisors (see below), whose sum is σ = 28386944841024. Its totient is φ = 14099880259584.

The previous prime is 21220011012199. The next prime is 21220011012209. The reversal of 21220011012201 is 10221011002212.

It is not a de Polignac number, because 21220011012201 - 2¹ = 21220011012199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21220011012209) 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, 17951305 + ... + 19096841.

It is an arithmetic number, because the mean of its divisors is an integer number (1774184052564).

Almost surely, 2^{21220011012201} is an apocalyptic number.

It is an amenable number.

21220011012201 is a deficient number, since it is larger than the sum of its proper divisors (7166933828823).

21220011012201 is a wasteful number, since it uses less digits than its factorization.

21220011012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165960.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21220011012201 its reverse (10221011002212), we get a palindrome (31441022014413).

The spelling of 21220011012201 in words is "twenty-one trillion, two hundred twenty billion, eleven million, twelve thousand, two hundred one".