102021220220021 has 8 divisors (see below), whose sum is σ = 102422395922880. Its totient is φ = 101620144989792.

The previous prime is 102021220220009. The next prime is 102021220220027. The reversal of 102021220220021 is 120022022120201.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021220220021 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 (102021220220027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23083016 + ... + 27145313.

It is an arithmetic number, because the mean of its divisors is an integer number (12802799490360).

Almost surely, 2^{102021220220021} is an apocalyptic number.

It is an amenable number.

102021220220021 is a deficient number, since it is larger than the sum of its proper divisors (401175702859).

102021220220021 is an equidigital number, since it uses as much as digits as its factorization.

102021220220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50236315.

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

Adding to 102021220220021 its reverse (120022022120201), we get a palindrome (222043242340222).

The spelling of 102021220220021 in words is "one hundred two trillion, twenty-one billion, two hundred twenty million, two hundred twenty thousand, twenty-one".