1212021111101 has 2 divisors, whose sum is σ = 1212021111102. Its totient is φ = 1212021111100.

The previous prime is 1212021111089. The next prime is 1212021111113. The reversal of 1212021111101 is 1011111202121.

It is a balanced prime because it is at equal distance from previous prime (1212021111089) and next prime (1212021111113).

It can be written as a sum of positive squares in only one way, i.e., 763000503001 + 449020608100 = 873499^2 + 670090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212021111101 - 2³⁴ = 1194841241917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212021111131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010555550 + 606010555551.

It is an arithmetic number, because the mean of its divisors is an integer number (606010555551).

Almost surely, 2^{1212021111101} is an apocalyptic number.

It is an amenable number.

1212021111101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021111101 is an equidigital number, since it uses as much as digits as its factorization.

1212021111101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212021111101 its reverse (1011111202121), we get a palindrome (2223132313222).

The spelling of 1212021111101 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred one".