1001021220201 has 32 divisors (see below), whose sum is σ = 1443086346240. Its totient is φ = 615063098304.

The previous prime is 1001021220139. The next prime is 1001021220217. The reversal of 1001021220201 is 1020221201001.

It is not a de Polignac number, because 1001021220201 - 2¹⁴ = 1001021203817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001021220301) 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, 21410416 + ... + 21457118.

It is an arithmetic number, because the mean of its divisors is an integer number (45096448320).

Almost surely, 2^{1001021220201} is an apocalyptic number.

It is an amenable number.

1001021220201 is a deficient number, since it is larger than the sum of its proper divisors (442065126039).

1001021220201 is a wasteful number, since it uses less digits than its factorization.

1001021220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56925.

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

Adding to 1001021220201 its reverse (1020221201001), we get a palindrome (2021242421202).

The spelling of 1001021220201 in words is "one trillion, one billion, twenty-one million, two hundred twenty thousand, two hundred one".