20212103131 has 16 divisors (see below), whose sum is σ = 23351833440. Its totient is φ = 17289902080.

The previous prime is 20212103129. The next prime is 20212103141. The reversal of 20212103131 is 13130121202.

It is not a de Polignac number, because 20212103131 - 2¹ = 20212103129 is a prime.

It is a super-2 number, since 2×20212103131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212103141) 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, 1093575 + ... + 1111903.

It is an arithmetic number, because the mean of its divisors is an integer number (1459489590).

Almost surely, 2^20212103131 is an apocalyptic number.

20212103131 is a deficient number, since it is larger than the sum of its proper divisors (3139730309).

20212103131 is a wasteful number, since it uses less digits than its factorization.

20212103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24254.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20212103131 its reverse (13130121202), we get a palindrome (33342224333).

The spelling of 20212103131 in words is "twenty billion, two hundred twelve million, one hundred three thousand, one hundred thirty-one".