220121201001 has 8 divisors (see below), whose sum is σ = 316071468160. Its totient is φ = 135459200592.

The previous prime is 220121200987. The next prime is 220121201009. The reversal of 220121201001 is 100102121022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-220121201001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121201009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2822066641 + ... + 2822066718.

It is an arithmetic number, because the mean of its divisors is an integer number (39508933520).

Almost surely, 2^220121201001 is an apocalyptic number.

It is an amenable number.

220121201001 is a deficient number, since it is larger than the sum of its proper divisors (95950267159).

220121201001 is a wasteful number, since it uses less digits than its factorization.

220121201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644133375.

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

Adding to 220121201001 its reverse (100102121022), we get a palindrome (320223322023).

The spelling of 220121201001 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred one thousand, one".