102021320331101 has 4 divisors (see below), whose sum is σ = 102204482486652. Its totient is φ = 101838158175552.

The previous prime is 102021320331079. The next prime is 102021320331103. The reversal of 102021320331101 is 101133023120201.

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 47841430562500 + 54179889768601 = 6916750^2 + 7360699^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021320331101 - 2⁴⁶ = 31652576153437 is a prime.

It is a super-2 number, since 2×102021320331101² (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 (102021320331103) 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, 91581076940 + ... + 91581078053.

It is an arithmetic number, because the mean of its divisors is an integer number (25551120621663).

Almost surely, 2^{102021320331101} is an apocalyptic number.

It is an amenable number.

102021320331101 is a deficient number, since it is larger than the sum of its proper divisors (183162155551).

102021320331101 is an equidigital number, since it uses as much as digits as its factorization.

102021320331101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183162155550.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 102021320331101 its reverse (101133023120201), we get a palindrome (203154343451302).

The spelling of 102021320331101 in words is "one hundred two trillion, twenty-one billion, three hundred twenty million, three hundred thirty-one thousand, one hundred one".