1211010222111 has 16 divisors (see below), whose sum is σ = 1658352119424. Its totient is φ = 785505073824.

The previous prime is 1211010222083. The next prime is 1211010222127. The reversal of 1211010222111 is 1112220101121.

It is a happy number.

It is not a de Polignac number, because 1211010222111 - 2¹⁰ = 1211010221087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211010222151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10836060 + ... + 10947246.

It is an arithmetic number, because the mean of its divisors is an integer number (103647007464).

Almost surely, 2^{1211010222111} is an apocalyptic number.

1211010222111 is a deficient number, since it is larger than the sum of its proper divisors (447341897313).

1211010222111 is a wasteful number, since it uses less digits than its factorization.

1211010222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209350.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211010222111 its reverse (1112220101121), we get a palindrome (2323230323232).

The spelling of 1211010222111 in words is "one trillion, two hundred eleven billion, ten million, two hundred twenty-two thousand, one hundred eleven".