121220022001 has 8 divisors (see below), whose sum is σ = 130547343080. Its totient is φ = 111893087232.

The previous prime is 121220021999. The next prime is 121220022067. The reversal of 121220022001 is 100220022121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4905601600 + 116314420401 = 70040^2 + 341049^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121220022001 - 2¹ = 121220021999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220022601) 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, 1191505 + ... + 1289233.

It is an arithmetic number, because the mean of its divisors is an integer number (16318417885).

Almost surely, 2^121220022001 is an apocalyptic number.

It is an amenable number.

121220022001 is a deficient number, since it is larger than the sum of its proper divisors (9327321079).

121220022001 is an equidigital number, since it uses as much as digits as its factorization.

121220022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193155.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121220022001 its reverse (100220022121), we get a palindrome (221440044122).

The spelling of 121220022001 in words is "one hundred twenty-one billion, two hundred twenty million, twenty-two thousand, one".