1222121021001 has 4 divisors (see below), whose sum is σ = 1629494694672. Its totient is φ = 814747347332.

The previous prime is 1222121020973. The next prime is 1222121021003. The reversal of 1222121021001 is 1001201212221.

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 1222121021001 - 2¹¹ = 1222121018953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222121021003) 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 3 ways as a sum of consecutive naturals, for example, 203686836831 + ... + 203686836836.

It is an arithmetic number, because the mean of its divisors is an integer number (407373673668).

Almost surely, 2^{1222121021001} is an apocalyptic number.

It is an amenable number.

1222121021001 is a deficient number, since it is larger than the sum of its proper divisors (407373673671).

1222121021001 is an equidigital number, since it uses as much as digits as its factorization.

1222121021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407373673670.

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

Adding to 1222121021001 its reverse (1001201212221), we get a palindrome (2223322233222).

The spelling of 1222121021001 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, one".