20020111333131 has 128 divisors (see below), whose sum is σ = 33150918721536. Its totient is φ = 10465069570560.

The previous prime is 20020111333109. The next prime is 20020111333147. The reversal of 20020111333131 is 13133311102002.

It is a happy number.

It is not a de Polignac number, because 20020111333131 - 2⁷ = 20020111333003 is a prime.

It is a super-2 number, since 2×20020111333131² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20020111333098 and 20020111333107.

It is not an unprimeable number, because it can be changed into a prime (20020111333171) 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, 12743545576 + ... + 12743547146.

It is an arithmetic number, because the mean of its divisors is an integer number (258991552512).

Almost surely, 2^{20020111333131} is an apocalyptic number.

20020111333131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20020111333131 is a deficient number, since it is larger than the sum of its proper divisors (13130807388405).

20020111333131 is a wasteful number, since it uses less digits than its factorization.

20020111333131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 20020111333131 its reverse (13133311102002), we get a palindrome (33153422435133).

The spelling of 20020111333131 in words is "twenty trillion, twenty billion, one hundred eleven million, three hundred thirty-three thousand, one hundred thirty-one".