1222220021001 has 32 divisors (see below), whose sum is σ = 1973130743808. Its totient is φ = 656946581760.

The previous prime is 1222220020997. The next prime is 1222220021047. The reversal of 1222220021001 is 1001200222221.

It is not a de Polignac number, because 1222220021001 - 2² = 1222220020997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222220021401) 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, 378385 + ... + 1608606.

It is an arithmetic number, because the mean of its divisors is an integer number (61660335744).

Almost surely, 2^{1222220021001} is an apocalyptic number.

It is an amenable number.

1222220021001 is a deficient number, since it is larger than the sum of its proper divisors (750910722807).

1222220021001 is a wasteful number, since it uses less digits than its factorization.

1222220021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988741.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1222220021001 its reverse (1001200222221), we get a palindrome (2223420243222).

The spelling of 1222220021001 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, twenty-one thousand, one".