1011211210001 has 16 divisors (see below), whose sum is σ = 1107669738240. Its totient is φ = 918864334080.

The previous prime is 1011211209977. The next prime is 1011211210007. The reversal of 1011211210001 is 1000121121101.

It is a cyclic number.

It is not a de Polignac number, because 1011211210001 - 2²² = 1011207015697 is a prime.

It is a super-2 number, since 2×1011211210001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011211210007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13575080 + ... + 13649366.

It is an arithmetic number, because the mean of its divisors is an integer number (69229358640).

Almost surely, 2^{1011211210001} is an apocalyptic number.

It is an amenable number.

1011211210001 is a deficient number, since it is larger than the sum of its proper divisors (96458528239).

1011211210001 is a wasteful number, since it uses less digits than its factorization.

1011211210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101944.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1011211210001 its reverse (1000121121101), we get a palindrome (2011332331102).

The spelling of 1011211210001 in words is "one trillion, eleven billion, two hundred eleven million, two hundred ten thousand, one".