1211010121211 has 8 divisors (see below), whose sum is σ = 1398813830064. Its totient is φ = 1036158392320.

The previous prime is 1211010121171. The next prime is 1211010121229. The reversal of 1211010121211 is 1121210101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211010121211 - 2¹⁴ = 1211010104827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211010121231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3237994790 + ... + 3237995163.

It is an arithmetic number, because the mean of its divisors is an integer number (174851728758).

Almost surely, 2^{1211010121211} is an apocalyptic number.

1211010121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211010121211 is a deficient number, since it is larger than the sum of its proper divisors (187803708853).

1211010121211 is a wasteful number, since it uses less digits than its factorization.

1211010121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475989981.

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

Adding to 1211010121211 its reverse (1121210101121), we get a palindrome (2332220222332).

The spelling of 1211010121211 in words is "one trillion, two hundred eleven billion, ten million, one hundred twenty-one thousand, two hundred eleven".