1021010122021 has 4 divisors (see below), whose sum is σ = 1021164663232. Its totient is φ = 1020855580812.

The previous prime is 1021010122001. The next prime is 1021010122037. The reversal of 1021010122021 is 1202210101201.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021010122021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021010121992 and 1021010122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021010122001) 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, 77260695 + ... + 77273908.

It is an arithmetic number, because the mean of its divisors is an integer number (255291165808).

Almost surely, 2^{1021010122021} is an apocalyptic number.

It is an amenable number.

1021010122021 is a deficient number, since it is larger than the sum of its proper divisors (154541211).

1021010122021 is an equidigital number, since it uses as much as digits as its factorization.

1021010122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154541210.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021010122021 its reverse (1202210101201), we get a palindrome (2223220223222).

The spelling of 1021010122021 in words is "one trillion, twenty-one billion, ten million, one hundred twenty-two thousand, twenty-one".