20021111320131 has 12 divisors (see below), whose sum is σ = 28926892645560. Its totient is φ = 13343941564800.

The previous prime is 20021111320117. The next prime is 20021111320141. The reversal of 20021111320131 is 13102311112002.

20021111320131 is a `hidden beast` number, since 2 + 0 + 0 + 211 + 1 + 1 + 320 + 131 = 666.

It is not a de Polignac number, because 20021111320131 - 2¹³ = 20021111311939 is a prime.

It is a super-2 number, since 2×20021111320131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021111320141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288795246 + ... + 288864563.

It is an arithmetic number, because the mean of its divisors is an integer number (2410574387130).

Almost surely, 2^{20021111320131} is an apocalyptic number.

20021111320131 is a deficient number, since it is larger than the sum of its proper divisors (8905781325429).

20021111320131 is a wasteful number, since it uses less digits than its factorization.

20021111320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577663666 (or 577663663 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20021111320131 its reverse (13102311112002), we get a palindrome (33123422432133).

The spelling of 20021111320131 in words is "twenty trillion, twenty-one billion, one hundred eleven million, three hundred twenty thousand, one hundred thirty-one".