1210121211011 has 2 divisors, whose sum is σ = 1210121211012. Its totient is φ = 1210121211010.

The previous prime is 1210121211001. The next prime is 1210121211037. The reversal of 1210121211011 is 1101121210121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210121211011 - 2¹⁴ = 1210121194627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1210121211001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605060605505 + 605060605506.

It is an arithmetic number, because the mean of its divisors is an integer number (605060605506).

Almost surely, 2^{1210121211011} is an apocalyptic number.

1210121211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210121211011 is an equidigital number, since it uses as much as digits as its factorization.

1210121211011 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 1210121211011 its reverse (1101121210121), we get a palindrome (2311242421132).

The spelling of 1210121211011 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, eleven".