1021331212011 has 48 divisors (see below), whose sum is σ = 1644209618688. Its totient is φ = 605711304000.

The previous prime is 1021331212007. The next prime is 1021331212021. The reversal of 1021331212011 is 1102121331201.

1021331212011 is a `hidden beast` number, since 10 + 213 + 312 + 120 + 11 = 666.

It is not a de Polignac number, because 1021331212011 - 2² = 1021331212007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021331212021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 491725 + ... + 1511441.

It is an arithmetic number, because the mean of its divisors is an integer number (34254367056).

Almost surely, 2^{1021331212011} is an apocalyptic number.

1021331212011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021331212011 is a deficient number, since it is larger than the sum of its proper divisors (622878406677).

1021331212011 is a wasteful number, since it uses less digits than its factorization.

1021331212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019952 (or 1019949 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1021331212011 its reverse (1102121331201), we get a palindrome (2123452543212).

The spelling of 1021331212011 in words is "one trillion, twenty-one billion, three hundred thirty-one million, two hundred twelve thousand, eleven".