102020021121 has 16 divisors (see below), whose sum is σ = 144455673024. Its totient is φ = 63822603264.

The previous prime is 102020021101. The next prime is 102020021141. The reversal of 102020021121 is 121120020201.

It is an interprime number because it is at equal distance from previous prime (102020021101) and next prime (102020021141).

It is not a de Polignac number, because 102020021121 - 2²⁵ = 101986466689 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102020021097 and 102020021106.

It is not an unprimeable number, because it can be changed into a prime (102020021101) 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, 2950755 + ... + 2985128.

It is an arithmetic number, because the mean of its divisors is an integer number (9028479564).

Almost surely, 2^102020021121 is an apocalyptic number.

It is an amenable number.

102020021121 is a deficient number, since it is larger than the sum of its proper divisors (42435651903).

102020021121 is a wasteful number, since it uses less digits than its factorization.

102020021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936240.

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

Adding to 102020021121 its reverse (121120020201), we get a palindrome (223140041322).

The spelling of 102020021121 in words is "one hundred two billion, twenty million, twenty-one thousand, one hundred twenty-one".