121020212001 has 12 divisors (see below), whose sum is σ = 174727407408. Its totient is φ = 74473976304.

The previous prime is 121020211999. The next prime is 121020212003. The reversal of 121020212001 is 100212020121.

It is an interprime number because it is at equal distance from previous prime (121020211999) and next prime (121020212003).

It is not a de Polignac number, because 121020212001 - 2¹ = 121020211999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121020212003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119348815 + ... + 119349828.

It is an arithmetic number, because the mean of its divisors is an integer number (14560617284).

Almost surely, 2^121020212001 is an apocalyptic number.

It is an amenable number.

121020212001 is a deficient number, since it is larger than the sum of its proper divisors (53707195407).

121020212001 is a wasteful number, since it uses less digits than its factorization.

121020212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238698672 (or 238698659 counting only the distinct ones).

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

Adding to 121020212001 its reverse (100212020121), we get a palindrome (221232232122).

The spelling of 121020212001 in words is "one hundred twenty-one billion, twenty million, two hundred twelve thousand, one".