1211321213310 has 32 divisors (see below), whose sum is σ = 3130799444640. Its totient is φ = 298171375488.

The previous prime is 1211321213209. The next prime is 1211321213339. The reversal of 1211321213310 is 133121231121.

It is a super-2 number, since 2×1211321213310² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1552975525 + ... + 1552976304.

It is an arithmetic number, because the mean of its divisors is an integer number (97837482645).

Almost surely, 2^{1211321213310} is an apocalyptic number.

1211321213310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211321213310 is an abundant number, since it is smaller than the sum of its proper divisors (1919478231330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211321213310 is a wasteful number, since it uses less digits than its factorization.

1211321213310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105951852.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1211321213310 its reverse (133121231121), we get a palindrome (1344442444431).

The spelling of 1211321213310 in words is "one trillion, two hundred eleven billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred ten".