10021212001221 has 8 divisors (see below), whose sum is σ = 13362863744160. Its totient is φ = 6680184129552.

The previous prime is 10021212001211. The next prime is 10021212001279. The reversal of 10021212001221 is 12210021212001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10021212001221 - 2²⁵ = 10021178446789 is a prime.

It is a super-4 number, since 4×10021212001221⁴ (a number of 53 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10021212001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021212001201) 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, 155930335 + ... + 155994588.

It is an arithmetic number, because the mean of its divisors is an integer number (1670357968020).

Almost surely, 2^{10021212001221} is an apocalyptic number.

It is an amenable number.

10021212001221 is a deficient number, since it is larger than the sum of its proper divisors (3341651742939).

10021212001221 is a wasteful number, since it uses less digits than its factorization.

10021212001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311935635.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10021212001221 its reverse (12210021212001), we get a palindrome (22231233213222).

The spelling of 10021212001221 in words is "ten trillion, twenty-one billion, two hundred twelve million, one thousand, two hundred twenty-one".