1011121212001 has 16 divisors (see below), whose sum is σ = 1106162345088. Its totient is φ = 920537363200.

The previous prime is 1011121211987. The next prime is 1011121212007. The reversal of 1011121212001 is 1002121211101.

It is a happy number.

1011121212001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1011121212001 - 2⁷ = 1011121211873 is a prime.

It is a super-2 number, since 2×1011121212001² (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 (1011121212007) 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, 7838995 + ... + 7966936.

It is an arithmetic number, because the mean of its divisors is an integer number (69135146568).

Almost surely, 2^{1011121212001} is an apocalyptic number.

It is an amenable number.

1011121212001 is a deficient number, since it is larger than the sum of its proper divisors (95041133087).

1011121212001 is a wasteful number, since it uses less digits than its factorization.

1011121212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15806072.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011121212001 its reverse (1002121211101), we get a palindrome (2013242423102).

The spelling of 1011121212001 in words is "one trillion, eleven billion, one hundred twenty-one million, two hundred twelve thousand, one".