1212021111113 has 2 divisors, whose sum is σ = 1212021111114. Its totient is φ = 1212021111112.

The previous prime is 1212021111101. The next prime is 1212021111131. The reversal of 1212021111113 is 3111111202121.

Together with next prime (1212021111131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 891679826944 + 320341284169 = 944288^2 + 565987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212021111113 - 2³² = 1207726143817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212021111091 and 1212021111100.

It is not a weakly prime, because it can be changed into another prime (1212021111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010555556 + 606010555557.

It is an arithmetic number, because the mean of its divisors is an integer number (606010555557).

Almost surely, 2^{1212021111113} is an apocalyptic number.

It is an amenable number.

1212021111113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021111113 is an equidigital number, since it uses as much as digits as its factorization.

1212021111113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1212021111113 its reverse (3111111202121), we get a palindrome (4323132313234).

The spelling of 1212021111113 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred thirteen".