20011212201 has 16 divisors (see below), whose sum is σ = 27407289024. Its totient is φ = 12978091584.

The previous prime is 20011212197. The next prime is 20011212241. The reversal of 20011212201 is 10221211002.

It is not a de Polignac number, because 20011212201 - 2² = 20011212197 is a prime.

It is a super-2 number, since 2×20011212201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011212241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917515 + ... + 939071.

It is an arithmetic number, because the mean of its divisors is an integer number (1712955564).

Almost surely, 2^20011212201 is an apocalyptic number.

It is an amenable number.

20011212201 is a deficient number, since it is larger than the sum of its proper divisors (7396076823).

20011212201 is a wasteful number, since it uses less digits than its factorization.

20011212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29960.

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

Adding to 20011212201 its reverse (10221211002), we get a palindrome (30232423203).

The spelling of 20011212201 in words is "twenty billion, eleven million, two hundred twelve thousand, two hundred one".