1010021021221 has 4 divisors (see below), whose sum is σ = 1010134937952. Its totient is φ = 1009907104492.

The previous prime is 1010021021203. The next prime is 1010021021257. The reversal of 1010021021221 is 1221201200101.

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 not a de Polignac number, because 1010021021221 - 2¹⁵ = 1010020988453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010021021521) 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, 56945065 + ... + 56962798.

It is an arithmetic number, because the mean of its divisors is an integer number (252533734488).

Almost surely, 2^{1010021021221} is an apocalyptic number.

It is an amenable number.

1010021021221 is a deficient number, since it is larger than the sum of its proper divisors (113916731).

1010021021221 is an equidigital number, since it uses as much as digits as its factorization.

1010021021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113916730.

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

Adding to 1010021021221 its reverse (1221201200101), we get a palindrome (2231222221322).

The spelling of 1010021021221 in words is "one trillion, ten billion, twenty-one million, twenty-one thousand, two hundred twenty-one".