1221010201001 has 8 divisors (see below), whose sum is σ = 1241475777504. Its totient is φ = 1200645689760.

The previous prime is 1221010200997. The next prime is 1221010201031. The reversal of 1221010201001 is 1001020101221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221010201001 - 2² = 1221010200997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221010201031) 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, 25241951 + ... + 25290276.

It is an arithmetic number, because the mean of its divisors is an integer number (155184472188).

Almost surely, 2^{1221010201001} is an apocalyptic number.

It is an amenable number.

1221010201001 is a deficient number, since it is larger than the sum of its proper divisors (20465576503).

1221010201001 is an equidigital number, since it uses as much as digits as its factorization.

1221010201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50532631.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1221010201001 its reverse (1001020101221), we get a palindrome (2222030302222).

The spelling of 1221010201001 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred one thousand, one".