121220120201001 has 32 divisors (see below), whose sum is σ = 162067038056448. Its totient is φ = 80593609037760.

The previous prime is 121220120200979. The next prime is 121220120201003. The reversal of 121220120201001 is 100102021022121.

It is not a de Polignac number, because 121220120201001 - 2⁶ = 121220120200937 is a prime.

It is a super-3 number, since 3×121220120201001³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121220120201003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10151582691 + ... + 10151594631.

It is an arithmetic number, because the mean of its divisors is an integer number (5064594939264).

Almost surely, 2^{121220120201001} is an apocalyptic number.

It is an amenable number.

121220120201001 is a deficient number, since it is larger than the sum of its proper divisors (40846917855447).

121220120201001 is a wasteful number, since it uses less digits than its factorization.

121220120201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17501.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121220120201001 its reverse (100102021022121), we get a palindrome (221322141223122).

The spelling of 121220120201001 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, two hundred one thousand, one".