102012101021021 has 4 divisors (see below), whose sum is σ = 102027415860444. Its totient is φ = 101996786181600.

The previous prime is 102012101021011. The next prime is 102012101021029. The reversal of 102012101021021 is 120120101210201.

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 62111894832100 + 39900206188921 = 7881110^2 + 6316661^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012101021021 - 2⁶ = 102012101020957 is a prime.

It is a super-3 number, since 3×102012101021021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102012101020987 and 102012101021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012101021029) 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, 7657409720 + ... + 7657423041.

It is an arithmetic number, because the mean of its divisors is an integer number (25506853965111).

Almost surely, 2^{102012101021021} is an apocalyptic number.

It is an amenable number.

102012101021021 is a deficient number, since it is larger than the sum of its proper divisors (15314839423).

102012101021021 is an equidigital number, since it uses as much as digits as its factorization.

102012101021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15314839422.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102012101021021 its reverse (120120101210201), we get a palindrome (222132202231222).

The spelling of 102012101021021 in words is "one hundred two trillion, twelve billion, one hundred one million, twenty-one thousand, twenty-one".