2021121011 has 8 divisors (see below), whose sum is σ = 2487533664. Its totient is φ = 1599128640.

The previous prime is 2021120989. The next prime is 2021121017. The reversal of 2021121011 is 1101211202.

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 2021121011 - 2²² = 2016926707 is a prime.

It is a super-2 number, since 2×2021121011² = 8169860282211324242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021120983 and 2021121001.

It is not an unprimeable number, because it can be changed into a prime (2021121017) 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, 11104970 + ... + 11105151.

It is an arithmetic number, because the mean of its divisors is an integer number (310941708).

Almost surely, 2^2021121011 is an apocalyptic number.

2021121011 is a deficient number, since it is larger than the sum of its proper divisors (466412653).

2021121011 is a wasteful number, since it uses less digits than its factorization.

2021121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22210141.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2021121011 is about 44956.8794624360. The cubic root of 2021121011 is about 1264.3406628241.

Adding to 2021121011 its reverse (1101211202), we get a palindrome (3122332213).

The spelling of 2021121011 in words is "two billion, twenty-one million, one hundred twenty-one thousand, eleven".