1021011122021 has 4 divisors (see below), whose sum is σ = 1113830314944. Its totient is φ = 928191929100.

The previous prime is 1021011121967. The next prime is 1021011122023. The reversal of 1021011122021 is 1202211101201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021011122021 - 2³⁰ = 1019937380197 is a prime.

It is a super-2 number, since 2×1021011122021² (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 = 1021011121987 and 1021011122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021011122023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46409596445 + ... + 46409596466.

It is an arithmetic number, because the mean of its divisors is an integer number (278457578736).

Almost surely, 2^{1021011122021} is an apocalyptic number.

1021011122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021011122021 is a deficient number, since it is larger than the sum of its proper divisors (92819192923).

1021011122021 is an equidigital number, since it uses as much as digits as its factorization.

1021011122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92819192922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021011122021 its reverse (1202211101201), we get a palindrome (2223222223222).

The spelling of 1021011122021 in words is "one trillion, twenty-one billion, eleven million, one hundred twenty-two thousand, twenty-one".