20111022201 has 4 divisors (see below), whose sum is σ = 26814696272. Its totient is φ = 13407348132.

The previous prime is 20111022199. The next prime is 20111022221. The reversal of 20111022201 is 10222011102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20111022201 - 2¹ = 20111022199 is a prime.

It is a super-2 number, since 2×20111022201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111022221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351837031 + ... + 3351837036.

It is an arithmetic number, because the mean of its divisors is an integer number (6703674068).

Almost surely, 2^20111022201 is an apocalyptic number.

It is an amenable number.

20111022201 is a deficient number, since it is larger than the sum of its proper divisors (6703674071).

20111022201 is an equidigital number, since it uses as much as digits as its factorization.

20111022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703674070.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20111022201 its reverse (10222011102), we get a palindrome (30333033303).

The spelling of 20111022201 in words is "twenty billion, one hundred eleven million, twenty-two thousand, two hundred one".