20011212320311 has 32 divisors (see below), whose sum is σ = 21171086380800. Its totient is φ = 18862332445440.

The previous prime is 20011212320303. The next prime is 20011212320459. The reversal of 20011212320311 is 11302321211002.

It is a cyclic number.

It is not a de Polignac number, because 20011212320311 - 2³ = 20011212320303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011212327311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5156198091 + ... + 5156201971.

It is an arithmetic number, because the mean of its divisors is an integer number (661596449400).

Almost surely, 2^{20011212320311} is an apocalyptic number.

20011212320311 is a deficient number, since it is larger than the sum of its proper divisors (1159874060489).

20011212320311 is a wasteful number, since it uses less digits than its factorization.

20011212320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20011212320311 its reverse (11302321211002), we get a palindrome (31313533531313).

The spelling of 20011212320311 in words is "twenty trillion, eleven billion, two hundred twelve million, three hundred twenty thousand, three hundred eleven".