102100211121 has 4 divisors (see below), whose sum is σ = 136133614832. Its totient is φ = 68066807412.

The previous prime is 102100211119. The next prime is 102100211149. The reversal of 102100211121 is 121112001201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121112001201 = 3 ⋅40370667067.

It is not a de Polignac number, because 102100211121 - 2¹ = 102100211119 is a prime.

It is a super-2 number, since 2×102100211121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100211097 and 102100211106.

It is not an unprimeable number, because it can be changed into a prime (102100211111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17016701851 + ... + 17016701856.

It is an arithmetic number, because the mean of its divisors is an integer number (34033403708).

Almost surely, 2^102100211121 is an apocalyptic number.

It is an amenable number.

102100211121 is a deficient number, since it is larger than the sum of its proper divisors (34033403711).

102100211121 is an equidigital number, since it uses as much as digits as its factorization.

102100211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34033403710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102100211121 its reverse (121112001201), we get a palindrome (223212212322).

The spelling of 102100211121 in words is "one hundred two billion, one hundred million, two hundred eleven thousand, one hundred twenty-one".