102121112211221 has 8 divisors (see below), whose sum is σ = 102686041855488. Its totient is φ = 101556190530000.

The previous prime is 102121112211199. The next prime is 102121112211229. The reversal of 102121112211221 is 122112211121201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102121112211221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121112211193 and 102121112211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121112211229) 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, 24717236 + ... + 28551426.

It is an arithmetic number, because the mean of its divisors is an integer number (12835755231936).

Almost surely, 2^{102121112211221} is an apocalyptic number.

It is an amenable number.

102121112211221 is a deficient number, since it is larger than the sum of its proper divisors (564929644267).

102121112211221 is a wasteful number, since it uses less digits than its factorization.

102121112211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981523.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 102121112211221 its reverse (122112211121201), we get a palindrome (224233323332422).

The spelling of 102121112211221 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty-one".