1011320221431 has 32 divisors (see below), whose sum is σ = 1490413103872. Its totient is φ = 606040807680.

The previous prime is 1011320221313. The next prime is 1011320221433. The reversal of 1011320221431 is 1341220231101.

It is not a de Polignac number, because 1011320221431 - 2²⁷ = 1011186003703 is a prime.

It is a super-2 number, since 2×1011320221431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011320221398 and 1011320221407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011320221433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355870 + ... + 1466043.

It is an arithmetic number, because the mean of its divisors is an integer number (46575409496).

Almost surely, 2^{1011320221431} is an apocalyptic number.

1011320221431 is a deficient number, since it is larger than the sum of its proper divisors (479092882441).

1011320221431 is a wasteful number, since it uses less digits than its factorization.

1011320221431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822303.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1011320221431 its reverse (1341220231101), we get a palindrome (2352540452532).

The spelling of 1011320221431 in words is "one trillion, eleven billion, three hundred twenty million, two hundred twenty-one thousand, four hundred thirty-one".