2131220330211 has 32 divisors (see below), whose sum is σ = 3251526819840. Its totient is φ = 1216358407584.

The previous prime is 2131220330207. The next prime is 2131220330219. The reversal of 2131220330211 is 1120330221312.

It is not a de Polignac number, because 2131220330211 - 2² = 2131220330207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2131220330219) 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, 119033686 + ... + 119051588.

It is an arithmetic number, because the mean of its divisors is an integer number (101610213120).

Almost surely, 2^{2131220330211} is an apocalyptic number.

2131220330211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2131220330211 is a deficient number, since it is larger than the sum of its proper divisors (1120306489629).

2131220330211 is a wasteful number, since it uses less digits than its factorization.

2131220330211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24495.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2131220330211 its reverse (1120330221312), we get a palindrome (3251550551523).

The spelling of 2131220330211 in words is "two trillion, one hundred thirty-one billion, two hundred twenty million, three hundred thirty thousand, two hundred eleven".