121221111133001 has 4 divisors (see below), whose sum is σ = 132241212145104. Its totient is φ = 110201010120900.

The previous prime is 121221111132943. The next prime is 121221111133061. The reversal of 121221111133001 is 100331111122121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121221111133001 - 2³⁰ = 121220037391177 is a prime.

It is a super-2 number, since 2×121221111133001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221111133061) 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, 5510050506035 + ... + 5510050506056.

It is an arithmetic number, because the mean of its divisors is an integer number (33060303036276).

Almost surely, 2^{121221111133001} is an apocalyptic number.

121221111133001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121221111133001 is a deficient number, since it is larger than the sum of its proper divisors (11020101012103).

121221111133001 is a wasteful number, since it uses less digits than its factorization.

121221111133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020101012102.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 121221111133001 its reverse (100331111122121), we get a palindrome (221552222255122).

The spelling of 121221111133001 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thirty-three thousand, one".