2021121086 has 16 divisors (see below), whose sum is σ = 3200904960. Its totient is φ = 954474840.

The previous prime is 2021121083. The next prime is 2021121107. The reversal of 2021121086 is 6801211202.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021121083) 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, 67766 + ... + 92921.

It is an arithmetic number, because the mean of its divisors is an integer number (200056560).

Almost surely, 2^2021121086 is an apocalyptic number.

2021121086 is a deficient number, since it is larger than the sum of its proper divisors (1179783874).

2021121086 is a wasteful number, since it uses less digits than its factorization.

2021121086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161039.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2021121086 is about 44956.8802965686. The cubic root of 2021121086 is about 1264.3406784632.

Adding to 2021121086 its reverse (6801211202), we get a palindrome (8822332288).

The spelling of 2021121086 in words is "two billion, twenty-one million, one hundred twenty-one thousand, eighty-six".