1012021211221 has 8 divisors (see below), whose sum is σ = 1057218102720. Its totient is φ = 966923983872.

The previous prime is 1012021211209. The next prime is 1012021211233. The reversal of 1012021211221 is 1221121202101.

It is an interprime number because it is at equal distance from previous prime (1012021211209) and next prime (1012021211233).

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 1012021211221 - 2⁵ = 1012021211189 is a prime.

It is a super-2 number, since 2×1012021211221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012021211195 and 1012021211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012021211261) 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, 24895276 + ... + 24935893.

It is an arithmetic number, because the mean of its divisors is an integer number (132152262840).

Almost surely, 2^{1012021211221} is an apocalyptic number.

It is an amenable number.

1012021211221 is a deficient number, since it is larger than the sum of its proper divisors (45196891499).

1012021211221 is an equidigital number, since it uses as much as digits as its factorization.

1012021211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49832075.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1012021211221 its reverse (1221121202101), we get a palindrome (2233142413322).

The spelling of 1012021211221 in words is "one trillion, twelve billion, twenty-one million, two hundred eleven thousand, two hundred twenty-one".