102021121011021 has 16 divisors (see below), whose sum is σ = 144034974324864. Its totient is φ = 64010960653824.

The previous prime is 102021121011001. The next prime is 102021121011109. The reversal of 102021121011021 is 120110121120201.

It is a happy number.

It is not a de Polignac number, because 102021121011021 - 2³⁵ = 101986761272653 is a prime.

It is a super-3 number, since 3×102021121011021³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021121011001) 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, 34369456 + ... + 37219641.

It is an arithmetic number, because the mean of its divisors is an integer number (9002185895304).

Almost surely, 2^{102021121011021} is an apocalyptic number.

It is an amenable number.

102021121011021 is a deficient number, since it is larger than the sum of its proper divisors (42013853313843).

102021121011021 is a wasteful number, since it uses less digits than its factorization.

102021121011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71617060.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102021121011021 its reverse (120110121120201), we get a palindrome (222131242131222).

The spelling of 102021121011021 in words is "one hundred two trillion, twenty-one billion, one hundred twenty-one million, eleven thousand, twenty-one".