221212210101012 has 96 divisors (see below), whose sum is σ = 623625936111360. Its totient is φ = 67404467260800.

The previous prime is 221212210100927. The next prime is 221212210101059. The reversal of 221212210101012 is 210101012212122.

221212210101012 is a `hidden beast` number, since 221 + 212 + 210 + 1 + 0 + 10 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 764702739 + ... + 764991962.

It is an arithmetic number, because the mean of its divisors is an integer number (6496103501160).

Almost surely, 2^{221212210101012} is an apocalyptic number.

It is an amenable number.

221212210101012 is an abundant number, since it is smaller than the sum of its proper divisors (402413726010348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212210101012 is a wasteful number, since it uses less digits than its factorization.

221212210101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529694830 (or 1529694822 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221212210101012 its reverse (210101012212122), we get a palindrome (431313222313134).

The spelling of 221212210101012 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred ten million, one hundred one thousand, twelve".