1031221012210 has 16 divisors (see below), whose sum is σ = 1862053341336. Its totient is φ = 411187178368.

The previous prime is 1031221012187. The next prime is 1031221012267. The reversal of 1031221012210 is 122101221301.

It can be written as a sum of positive squares in 4 ways, for example, as 737865538081 + 293355474129 = 858991^2 + 541623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162649987 + ... + 162656326.

Almost surely, 2^{1031221012210} is an apocalyptic number.

1031221012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1031221012210 is a deficient number, since it is larger than the sum of its proper divisors (830832329126).

1031221012210 is a wasteful number, since it uses less digits than its factorization.

1031221012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325306637.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1031221012210 its reverse (122101221301), we get a palindrome (1153322233511).

The spelling of 1031221012210 in words is "one trillion, thirty-one billion, two hundred twenty-one million, twelve thousand, two hundred ten".