1211012000221 has 8 divisors (see below), whose sum is σ = 1282507496064. Its totient is φ = 1139545337280.

The previous prime is 1211012000189. The next prime is 1211012000269. The reversal of 1211012000221 is 1220002101121.

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 1211012000221 - 2⁵ = 1211012000189 is a prime.

It is a super-3 number, since 3×1211012000221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012000291) 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, 7121715 + ... + 7289776.

It is an arithmetic number, because the mean of its divisors is an integer number (160313437008).

Almost surely, 2^{1211012000221} is an apocalyptic number.

It is an amenable number.

1211012000221 is a deficient number, since it is larger than the sum of its proper divisors (71495495843).

1211012000221 is a wasteful number, since it uses less digits than its factorization.

1211012000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14416451.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211012000221 its reverse (1220002101121), we get a palindrome (2431014101342).

The spelling of 1211012000221 in words is "one trillion, two hundred eleven billion, twelve million, two hundred twenty-one", and thus it is an aban number.