102021002222021 has 4 divisors (see below), whose sum is σ = 102033727813452. Its totient is φ = 102008276630592.

The previous prime is 102021002222011. The next prime is 102021002222071. The reversal of 102021002222021 is 120222200120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20214150880225 + 81806851341796 = 4496015^2 + 9044714^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021002222021 - 2²⁶ = 102020935113157 is a prime.

It is a super-2 number, since 2×102021002222021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021002222011) 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, 6362783690 + ... + 6362799723.

It is an arithmetic number, because the mean of its divisors is an integer number (25508431953363).

Almost surely, 2^{102021002222021} is an apocalyptic number.

It is an amenable number.

102021002222021 is a deficient number, since it is larger than the sum of its proper divisors (12725591431).

102021002222021 is an equidigital number, since it uses as much as digits as its factorization.

102021002222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12725591430.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102021002222021 its reverse (120222200120201), we get a palindrome (222243202342222).

The spelling of 102021002222021 in words is "one hundred two trillion, twenty-one billion, two million, two hundred twenty-two thousand, twenty-one".