20102210121 has 32 divisors (see below), whose sum is σ = 33284300800. Its totient is φ = 10531347840.

The previous prime is 20102210119. The next prime is 20102210123. The reversal of 20102210121 is 12101220102.

It is an interprime number because it is at equal distance from previous prime (20102210119) and next prime (20102210123).

It is not a de Polignac number, because 20102210121 - 2¹ = 20102210119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102210097 and 20102210106.

It is not an unprimeable number, because it can be changed into a prime (20102210123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 800236 + ... + 824973.

It is an arithmetic number, because the mean of its divisors is an integer number (1040134400).

Almost surely, 2^20102210121 is an apocalyptic number.

20102210121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20102210121 is a deficient number, since it is larger than the sum of its proper divisors (13182090679).

20102210121 is a wasteful number, since it uses less digits than its factorization.

20102210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625269.

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

Adding to 20102210121 its reverse (12101220102), we get a palindrome (32203430223).

The spelling of 20102210121 in words is "twenty billion, one hundred two million, two hundred ten thousand, one hundred twenty-one".