103212020112121 has 8 divisors (see below), whose sum is σ = 109661458377960. Its totient is φ = 97140724806784.

The previous prime is 103212020112119. The next prime is 103212020112161. The reversal of 103212020112121 is 121211020212301.

It can be written as a sum of positive squares in 4 ways, for example, as 54323326830096 + 48888693282025 = 7370436^2 + 6992045^2 .

It is not a de Polignac number, because 103212020112121 - 2¹ = 103212020112119 is a prime.

It is a super-2 number, since 2×103212020112121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103212020112161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10503966196 + ... + 10503976021.

It is an arithmetic number, because the mean of its divisors is an integer number (13707682297245).

Almost surely, 2^{103212020112121} is an apocalyptic number.

It is an amenable number.

103212020112121 is a deficient number, since it is larger than the sum of its proper divisors (6449438265839).

103212020112121 is an frugal number, since it uses more digits than its factorization.

103212020112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21007942268 (or 21007942234 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 103212020112121 its reverse (121211020212301), we get a palindrome (224423040324422).

The spelling of 103212020112121 in words is "one hundred three trillion, two hundred twelve billion, twenty million, one hundred twelve thousand, one hundred twenty-one".