1220121020001 has 8 divisors (see below), whose sum is σ = 1751968644160. Its totient is φ = 750843704592.

The previous prime is 1220121019921. The next prime is 1220121020003. The reversal of 1220121020001 is 1000201210221.

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

It is not a de Polignac number, because 1220121020001 - 2¹⁵ = 1220120987233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220121020003) 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, 15642577141 + ... + 15642577218.

It is an arithmetic number, because the mean of its divisors is an integer number (218996080520).

Almost surely, 2^{1220121020001} is an apocalyptic number.

It is an amenable number.

1220121020001 is a deficient number, since it is larger than the sum of its proper divisors (531847624159).

1220121020001 is a wasteful number, since it uses less digits than its factorization.

1220121020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31285154375.

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

Adding to 1220121020001 its reverse (1000201210221), we get a palindrome (2220322230222).

The spelling of 1220121020001 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, twenty thousand, one".