1001201021122 has 4 divisors (see below), whose sum is σ = 1501801531686. Its totient is φ = 500600510560.

The previous prime is 1001201021063. The next prime is 1001201021129. The reversal of 1001201021122 is 2211201021001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 951325178881 + 49875842241 = 975359^2 + 223329^2 .

It is not an unprimeable number, because it can be changed into a prime (1001201021129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250300255279 + ... + 250300255282.

Almost surely, 2^{1001201021122} is an apocalyptic number.

1001201021122 is a deficient number, since it is larger than the sum of its proper divisors (500600510564).

1001201021122 is an equidigital number, since it uses as much as digits as its factorization.

1001201021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500600510563.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1001201021122 its reverse (2211201021001), we get a palindrome (3212402042123).

The spelling of 1001201021122 in words is "one trillion, one billion, two hundred one million, twenty-one thousand, one hundred twenty-two".