102120202001021 has 8 divisors (see below), whose sum is σ = 103727427769944. Its totient is φ = 100524665147200.

The previous prime is 102120202000991. The next prime is 102120202001039. The reversal of 102120202001021 is 120100202021201.

It can be written as a sum of positive squares in 4 ways, for example, as 35764287105625 + 66355914895396 = 5980325^2 + 8145914^2 .

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-102120202001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120202000987 and 102120202001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120202001921) 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, 2922211166 + ... + 2922246111.

It is an arithmetic number, because the mean of its divisors is an integer number (12965928471243).

Almost surely, 2^{102120202001021} is an apocalyptic number.

It is an amenable number.

102120202001021 is a deficient number, since it is larger than the sum of its proper divisors (1607225768923).

102120202001021 is a wasteful number, since it uses less digits than its factorization.

102120202001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5844457551.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102120202001021 its reverse (120100202021201), we get a palindrome (222220404022222).

The spelling of 102120202001021 in words is "one hundred two trillion, one hundred twenty billion, two hundred two million, one thousand, twenty-one".