1012021121011 has 4 divisors (see below), whose sum is σ = 1012096540224. Its totient is φ = 1011945701800.

The previous prime is 1012021120997. The next prime is 1012021121053. The reversal of 1012021121011 is 1101211202101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012021121011 - 2¹⁹ = 1012020596723 is a prime.

It is a super-2 number, since 2×1012021121011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012021120982 and 1012021121000.

It is not an unprimeable number, because it can be changed into a prime (1012021121611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37689475 + ... + 37716316.

It is an arithmetic number, because the mean of its divisors is an integer number (253024135056).

Almost surely, 2^{1012021121011} is an apocalyptic number.

1012021121011 is a deficient number, since it is larger than the sum of its proper divisors (75419213).

1012021121011 is an equidigital number, since it uses as much as digits as its factorization.

1012021121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75419212.

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

Adding to 1012021121011 its reverse (1101211202101), we get a palindrome (2113232323112).

The spelling of 1012021121011 in words is "one trillion, twelve billion, twenty-one million, one hundred twenty-one thousand, eleven".