1021022121021 has 8 divisors (see below), whose sum is σ = 1555843232064. Its totient is φ = 583441212000.

The previous prime is 1021022121019. The next prime is 1021022121023. The reversal of 1021022121021 is 1201212201201.

It is an interprime number because it is at equal distance from previous prime (1021022121019) and next prime (1021022121023).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021022121021 - 2¹ = 1021022121019 is a prime.

It is a super-2 number, since 2×1021022121021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021022121023) 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 7 ways as a sum of consecutive naturals, for example, 24310050480 + ... + 24310050521.

It is an arithmetic number, because the mean of its divisors is an integer number (194480404008).

Almost surely, 2^{1021022121021} is an apocalyptic number.

It is an amenable number.

1021022121021 is a deficient number, since it is larger than the sum of its proper divisors (534821111043).

1021022121021 is an equidigital number, since it uses as much as digits as its factorization.

1021022121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48620101011.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021022121021 its reverse (1201212201201), we get a palindrome (2222234322222).

The spelling of 1021022121021 in words is "one trillion, twenty-one billion, twenty-two million, one hundred twenty-one thousand, twenty-one".