1212221000101 has 8 divisors (see below), whose sum is σ = 1283970308544. Its totient is φ = 1140520824000.

The previous prime is 1212221000077. The next prime is 1212221000117. The reversal of 1212221000101 is 1010001222121.

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 1212221000101 - 2³⁹ = 662465186213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221000701) 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, 12232275 + ... + 12330976.

It is an arithmetic number, because the mean of its divisors is an integer number (160496288568).

Almost surely, 2^{1212221000101} is an apocalyptic number.

It is an amenable number.

1212221000101 is a deficient number, since it is larger than the sum of its proper divisors (71749308443).

1212221000101 is a wasteful number, since it uses less digits than its factorization.

1212221000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24566171.

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

Adding to 1212221000101 its reverse (1010001222121), we get a palindrome (2222222222222).

The spelling of 1212221000101 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred one", and thus it is an aban number.