1011212001021 has 4 divisors (see below), whose sum is σ = 1348282668032. Its totient is φ = 674141334012.

The previous prime is 1011212001013. The next prime is 1011212001031. The reversal of 1011212001021 is 1201002121101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1011212001021 - 2³ = 1011212001013 is a prime.

It is a super-2 number, since 2×1011212001021² (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 = 1011212000988 and 1011212001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212001031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168535333501 + ... + 168535333506.

It is an arithmetic number, because the mean of its divisors is an integer number (337070667008).

Almost surely, 2^{1011212001021} is an apocalyptic number.

It is an amenable number.

1011212001021 is a deficient number, since it is larger than the sum of its proper divisors (337070667011).

1011212001021 is an equidigital number, since it uses as much as digits as its factorization.

1011212001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337070667010.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011212001021 its reverse (1201002121101), we get a palindrome (2212214122122).

The spelling of 1011212001021 in words is "one trillion, eleven billion, two hundred twelve million, one thousand, twenty-one".