1011320221240 has 32 divisors (see below), whose sum is σ = 2600537712480. Its totient is φ = 346738361472.

The previous prime is 1011320221237. The next prime is 1011320221313. The reversal of 1011320221240 is 421220231101.

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, 1805928687 + ... + 1805929246.

It is an arithmetic number, because the mean of its divisors is an integer number (81266803515).

Almost surely, 2^{1011320221240} is an apocalyptic number.

1011320221240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011320221240 is an abundant number, since it is smaller than the sum of its proper divisors (1589217491240).

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

1011320221240 is a wasteful number, since it uses less digits than its factorization.

1011320221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611857951 (or 3611857947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1011320221240 its reverse (421220231101), we get a palindrome (1432540452341).

The spelling of 1011320221240 in words is "one trillion, eleven billion, three hundred twenty million, two hundred twenty-one thousand, two hundred forty".