221020001202001 has 32 divisors (see below), whose sum is σ = 227240934979968. Its totient is φ = 214912534287360.

The previous prime is 221020001201957. The next prime is 221020001202041. The reversal of 221020001202001 is 100202100020122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221020001202001 - 2¹⁷ = 221020001070929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020001202041) 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, 2410441566 + ... + 2410533256.

It is an arithmetic number, because the mean of its divisors is an integer number (7101279218124).

Almost surely, 2^{221020001202001} is an apocalyptic number.

It is an amenable number.

221020001202001 is a deficient number, since it is larger than the sum of its proper divisors (6220933777967).

221020001202001 is a wasteful number, since it uses less digits than its factorization.

221020001202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93681.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221020001202001 its reverse (100202100020122), we get a palindrome (321222101222123).

The spelling of 221020001202001 in words is "two hundred twenty-one trillion, twenty billion, one million, two hundred two thousand, one".