1020120221001 has 32 divisors (see below), whose sum is σ = 1622353287168. Its totient is φ = 557478535680.

The previous prime is 1020120220963. The next prime is 1020120221083. The reversal of 1020120221001 is 1001220210201.

It is not a de Polignac number, because 1020120221001 - 2¹⁵ = 1020120188233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020120225001) 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, 2468121 + ... + 2851641.

It is an arithmetic number, because the mean of its divisors is an integer number (50698540224).

Almost surely, 2^{1020120221001} is an apocalyptic number.

It is an amenable number.

1020120221001 is a deficient number, since it is larger than the sum of its proper divisors (602233066167).

1020120221001 is a wasteful number, since it uses less digits than its factorization.

1020120221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389061.

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

Adding to 1020120221001 its reverse (1001220210201), we get a palindrome (2021340431202).

It can be divided in two parts, 1020 and 120221001, that added together give a palindrome (120222021).

The spelling of 1020120221001 in words is "one trillion, twenty billion, one hundred twenty million, two hundred twenty-one thousand, one".