102021020002021 has 32 divisors (see below), whose sum is σ = 111041129041920. Its totient is φ = 93492646974144.

The previous prime is 102021020002007. The next prime is 102021020002039. The reversal of 102021020002021 is 120200020120201.

It is a happy number.

It is not a de Polignac number, because 102021020002021 - 2¹¹ = 102021019999973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021020001992 and 102021020002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021020009021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4563906 + ... + 14995708.

It is an arithmetic number, because the mean of its divisors is an integer number (3470035282560).

Almost surely, 2^{102021020002021} is an apocalyptic number.

It is an amenable number.

102021020002021 is a deficient number, since it is larger than the sum of its proper divisors (9020109039899).

102021020002021 is a wasteful number, since it uses less digits than its factorization.

102021020002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10432065.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102021020002021 its reverse (120200020120201), we get a palindrome (222221040122222).

The spelling of 102021020002021 in words is "one hundred two trillion, twenty-one billion, twenty million, two thousand, twenty-one".