12021221212010 has 64 divisors (see below), whose sum is σ = 23018898494592. Its totient is φ = 4504366995456.

The previous prime is 12021221211983. The next prime is 12021221212031. The reversal of 12021221212010 is 1021212212021.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 12021221212010.

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, 41084489 + ... + 41376051.

It is an arithmetic number, because the mean of its divisors is an integer number (359670288978).

Almost surely, 2^{12021221212010} is an apocalyptic number.

12021221212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021221212010 is a deficient number, since it is larger than the sum of its proper divisors (10997677282582).

12021221212010 is a wasteful number, since it uses less digits than its factorization.

12021221212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292727.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021221212010 its reverse (1021212212021), we get a palindrome (13042433424031).

The spelling of 12021221212010 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, ten".