102021002001021 has 16 divisors (see below), whose sum is σ = 141543389378304. Its totient is φ = 65310915768384.

The previous prime is 102021002000999. The next prime is 102021002001089. The reversal of 102021002001021 is 120100200120201.

It is not a de Polignac number, because 102021002001021 - 2¹³ = 102021001992829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021002000988 and 102021002001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021002001521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6825966166 + ... + 6825981111.

It is an arithmetic number, because the mean of its divisors is an integer number (8846461836144).

Almost surely, 2^{102021002001021} is an apocalyptic number.

It is an amenable number.

102021002001021 is a deficient number, since it is larger than the sum of its proper divisors (39522387377283).

102021002001021 is a wasteful number, since it uses less digits than its factorization.

102021002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13651947380.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102021002001021 its reverse (120100200120201), we get a palindrome (222121202121222).

The spelling of 102021002001021 in words is "one hundred two trillion, twenty-one billion, two million, one thousand, twenty-one".