20011202211 has 128 divisors (see below), whose sum is σ = 38733004800. Its totient is φ = 8844111360.

The previous prime is 20011202207. The next prime is 20011202219. The reversal of 20011202211 is 11220211002.

It is not a de Polignac number, because 20011202211 - 2² = 20011202207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011202219) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2106370 + ... + 2115848.

It is an arithmetic number, because the mean of its divisors is an integer number (302601600).

Almost surely, 2^20011202211 is an apocalyptic number.

20011202211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20011202211 is a deficient number, since it is larger than the sum of its proper divisors (18721802589).

20011202211 is a wasteful number, since it uses less digits than its factorization.

20011202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9569.

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

Adding to 20011202211 its reverse (11220211002), we get a palindrome (31231413213).

It can be divided in two parts, 20011 and 202211, that added together give a palindrome (222222).

The spelling of 20011202211 in words is "twenty billion, eleven million, two hundred two thousand, two hundred eleven".