1210220021001 has 32 divisors (see below), whose sum is σ = 1720390510080. Its totient is φ = 754583731200.

The previous prime is 1210220020951. The next prime is 1210220021011. The reversal of 1210220021001 is 1001200220121.

It is not a de Polignac number, because 1210220021001 - 2¹⁹ = 1210219496713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1210220021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1021246 + ... + 1861016.

It is an arithmetic number, because the mean of its divisors is an integer number (53762203440).

Almost surely, 2^{1210220021001} is an apocalyptic number.

It is an amenable number.

1210220021001 is a deficient number, since it is larger than the sum of its proper divisors (510170489079).

1210220021001 is a wasteful number, since it uses less digits than its factorization.

1210220021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840117.

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

Adding to 1210220021001 its reverse (1001200220121), we get a palindrome (2211420241122).

The spelling of 1210220021001 in words is "one trillion, two hundred ten billion, two hundred twenty million, twenty-one thousand, one".