221212211210101 has 8 divisors (see below), whose sum is σ = 228349686752000. Its totient is φ = 214074835528320.

The previous prime is 221212211210083. The next prime is 221212211210129. The reversal of 221212211210101 is 101012112212122.

It is a happy number.

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 221212211210101 - 2⁷ = 221212211209973 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 (221212211210131) 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, 20450151 + ... + 29336548.

It is an arithmetic number, because the mean of its divisors is an integer number (28543710844000).

Almost surely, 2^{221212211210101} is an apocalyptic number.

It is an amenable number.

221212211210101 is a deficient number, since it is larger than the sum of its proper divisors (7137475541899).

221212211210101 is a wasteful number, since it uses less digits than its factorization.

221212211210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49930059.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221212211210101 its reverse (101012112212122), we get a palindrome (322224323422223).

The spelling of 221212211210101 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred eleven million, two hundred ten thousand, one hundred one".