112131000021221 has 2 divisors, whose sum is σ = 112131000021222. Its totient is φ = 112131000021220.

The previous prime is 112131000021211. The next prime is 112131000021269. The reversal of 112131000021221 is 122120000131211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85728821748196 + 26402178273025 = 9258986^2 + 5138305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112131000021221 is a prime.

It is a super-2 number, since 2×112131000021221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 112131000021221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112131000021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56065500010610 + 56065500010611.

It is an arithmetic number, because the mean of its divisors is an integer number (56065500010611).

Almost surely, 2^{112131000021221} is an apocalyptic number.

It is an amenable number.

112131000021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

112131000021221 is an equidigital number, since it uses as much as digits as its factorization.

112131000021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 112131000021221 its reverse (122120000131211), we get a palindrome (234251000152432).

The spelling of 112131000021221 in words is "one hundred twelve trillion, one hundred thirty-one billion, twenty-one thousand, two hundred twenty-one".