1011212102021 has 4 divisors (see below), whose sum is σ = 1103140474944. Its totient is φ = 919283729100.

The previous prime is 1011212102003. The next prime is 1011212102027. The reversal of 1011212102021 is 1202012121101.

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 a de Polignac number, because none of the positive numbers 2^k-1011212102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011212101987 and 1011212102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212102027) 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 3 ways as a sum of consecutive naturals, for example, 45964186445 + ... + 45964186466.

It is an arithmetic number, because the mean of its divisors is an integer number (275785118736).

Almost surely, 2^{1011212102021} is an apocalyptic number.

1011212102021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011212102021 is a deficient number, since it is larger than the sum of its proper divisors (91928372923).

1011212102021 is an equidigital number, since it uses as much as digits as its factorization.

1011212102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91928372922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011212102021 its reverse (1202012121101), we get a palindrome (2213224223122).

The spelling of 1011212102021 in words is "one trillion, eleven billion, two hundred twelve million, one hundred two thousand, twenty-one".