102012122120021 has 8 divisors (see below), whose sum is σ = 106112818975800. Its totient is φ = 97950294429120.

The previous prime is 102012122120017. The next prime is 102012122120063. The reversal of 102012122120021 is 120021221210201.

It can be written as a sum of positive squares in 4 ways, for example, as 711138024100 + 101300984095921 = 843290^2 + 10064839^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 102012122120021 - 2² = 102012122120017 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 (102012122120071) 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, 9717285866 + ... + 9717296363.

It is an arithmetic number, because the mean of its divisors is an integer number (13264102371975).

Almost surely, 2^{102012122120021} is an apocalyptic number.

It is an amenable number.

102012122120021 is a deficient number, since it is larger than the sum of its proper divisors (4100696855779).

102012122120021 is a wasteful number, since it uses less digits than its factorization.

102012122120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19434582439.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102012122120021 its reverse (120021221210201), we get a palindrome (222033343330222).

The spelling of 102012122120021 in words is "one hundred two trillion, twelve billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".