1031221012211 has 8 divisors (see below), whose sum is σ = 1112539511664. Its totient is φ = 950187342240.

The previous prime is 1031221012187. The next prime is 1031221012267. The reversal of 1031221012211 is 1122101221301.

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 1031221012211 - 2¹⁸ = 1031220750067 is a prime.

It is a super-2 number, since 2×1031221012211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031221012211.

It is not an unprimeable number, because it can be changed into a prime (1031221002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71199845 + ... + 71214326.

It is an arithmetic number, because the mean of its divisors is an integer number (139067438958).

Almost surely, 2^{1031221012211} is an apocalyptic number.

1031221012211 is a deficient number, since it is larger than the sum of its proper divisors (81318499453).

1031221012211 is a wasteful number, since it uses less digits than its factorization.

1031221012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142414741.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1031221012211 its reverse (1122101221301), we get a palindrome (2153322233512).

The spelling of 1031221012211 in words is "one trillion, thirty-one billion, two hundred twenty-one million, twelve thousand, two hundred eleven".