20120220111211 has 16 divisors (see below), whose sum is σ = 23470571816928. Its totient is φ = 17044714432000.

The previous prime is 20120220111191. The next prime is 20120220111221. The reversal of 20120220111211 is 11211102202102.

It is a cyclic number.

It is not a de Polignac number, because 20120220111211 - 2⁵ = 20120220111179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20120220111221) 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, 532628440 + ... + 532666213.

It is an arithmetic number, because the mean of its divisors is an integer number (1466910738558).

Almost surely, 2^{20120220111211} is an apocalyptic number.

20120220111211 is a deficient number, since it is larger than the sum of its proper divisors (3350351705717).

20120220111211 is a wasteful number, since it uses less digits than its factorization.

20120220111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065294782.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20120220111211 its reverse (11211102202102), we get a palindrome (31331322313313).

The spelling of 20120220111211 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, one hundred eleven thousand, two hundred eleven".