1011323020021 has 8 divisors (see below), whose sum is σ = 1073368255680. Its totient is φ = 949561745088.

The previous prime is 1011323019997. The next prime is 1011323020067. The reversal of 1011323020021 is 1200203231101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011323020021 - 2²³ = 1011314631413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011323019977 and 1011323020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011323020621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70982841 + ... + 70997086.

It is an arithmetic number, because the mean of its divisors is an integer number (134171031960).

Almost surely, 2^{1011323020021} is an apocalyptic number.

It is an amenable number.

1011323020021 is a deficient number, since it is larger than the sum of its proper divisors (62045235659).

1011323020021 is a wasteful number, since it uses less digits than its factorization.

1011323020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141980363.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1011323020021 its reverse (1200203231101), we get a palindrome (2211526251122).

The spelling of 1011323020021 in words is "one trillion, eleven billion, three hundred twenty-three million, twenty thousand, twenty-one".