1211101012 has 24 divisors (see below), whose sum is σ = 2448109440. Its totient is φ = 518117760.

The previous prime is 1211100997. The next prime is 1211101019. The reversal of 1211101012 is 2101011121.

It is a super-2 number, since 2×1211101012² = 2933531322534848288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211101019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808812 + ... + 810307.

It is an arithmetic number, because the mean of its divisors is an integer number (102004560).

Almost surely, 2^1211101012 is an apocalyptic number.

It is an amenable number.

1211101012 is an abundant number, since it is smaller than the sum of its proper divisors (1237008428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211101012 is a wasteful number, since it uses less digits than its factorization.

1211101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619151 (or 1619149 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1211101012 is about 34800.8765981548. The cubic root of 1211101012 is about 1065.9253456303.

Adding to 1211101012 its reverse (2101011121), we get a palindrome (3312112133).

The spelling of 1211101012 in words is "one billion, two hundred eleven million, one hundred one thousand, twelve".