121001212102101 has 64 divisors (see below), whose sum is σ = 174681553536000. Its totient is φ = 74252483136000.

The previous prime is 121001212102093. The next prime is 121001212102109. The reversal of 121001212102101 is 101201212100121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121001212102093) and next prime (121001212102109).

It is not a de Polignac number, because 121001212102101 - 2³ = 121001212102093 is a prime.

It is a super-2 number, since 2×121001212102101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001212102109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1358741026 + ... + 1358830076.

It is an arithmetic number, because the mean of its divisors is an integer number (2729399274000).

Almost surely, 2^{121001212102101} is an apocalyptic number.

It is an amenable number.

121001212102101 is a deficient number, since it is larger than the sum of its proper divisors (53680341433899).

121001212102101 is a wasteful number, since it uses less digits than its factorization.

121001212102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91490.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121001212102101 its reverse (101201212100121), we get a palindrome (222202424202222).

The spelling of 121001212102101 in words is "one hundred twenty-one trillion, one billion, two hundred twelve million, one hundred two thousand, one hundred one".