102202122121 has 16 divisors (see below), whose sum is σ = 122463959040. Its totient is φ = 84193963920.

The previous prime is 102202122109. The next prime is 102202122179. The reversal of 102202122121 is 121221202201.

It is a happy number.

It is not a de Polignac number, because 102202122121 - 2¹³ = 102202113929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102202122095 and 102202122104.

It is not an unprimeable number, because it can be changed into a prime (102202122821) 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, 10625745 + ... + 10635358.

It is an arithmetic number, because the mean of its divisors is an integer number (7653997440).

Almost surely, 2^102202122121 is an apocalyptic number.

102202122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102202122121 is a deficient number, since it is larger than the sum of its proper divisors (20261836919).

102202122121 is a wasteful number, since it uses less digits than its factorization.

102202122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21261156.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102202122121 its reverse (121221202201), we get a palindrome (223423324322).

The spelling of 102202122121 in words is "one hundred two billion, two hundred two million, one hundred twenty-two thousand, one hundred twenty-one".