1211102031320 has 32 divisors (see below), whose sum is σ = 2885272488000. Its totient is φ = 455944293888.

The previous prime is 1211102031313. The next prime is 1211102031341. The reversal of 1211102031320 is 231302011121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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, 890515520 + ... + 890516879.

It is an arithmetic number, because the mean of its divisors is an integer number (90164765250).

Almost surely, 2^{1211102031320} is an apocalyptic number.

1211102031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211102031320 is an abundant number, since it is smaller than the sum of its proper divisors (1674170456680).

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

1211102031320 is a wasteful number, since it uses less digits than its factorization.

1211102031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781032427 (or 1781032423 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1211102031320 its reverse (231302011121), we get a palindrome (1442404042441).

The spelling of 1211102031320 in words is "one trillion, two hundred eleven billion, one hundred two million, thirty-one thousand, three hundred twenty".