1222121001 has 8 divisors (see below), whose sum is σ = 1629688384. Its totient is φ = 814650480.

The previous prime is 1222120997. The next prime is 1222121009. The reversal of 1222121001 is 1001212221.

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

It is not a de Polignac number, because 1222121001 - 2² = 1222120997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222121009) 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, 13716 + ... + 51306.

It is an arithmetic number, because the mean of its divisors is an integer number (203711048).

Almost surely, 2^1222121001 is an apocalyptic number.

It is an amenable number.

1222121001 is a deficient number, since it is larger than the sum of its proper divisors (407567383).

1222121001 is a wasteful number, since it uses less digits than its factorization.

1222121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48431.

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

The square root of 1222121001 is about 34958.8472493016. The cubic root of 1222121001 is about 1069.1485936797.

Adding to 1222121001 its reverse (1001212221), we get a palindrome (2223333222).

The spelling of 1222121001 in words is "one billion, two hundred twenty-two million, one hundred twenty-one thousand, one".