2021012102 has 16 divisors (see below), whose sum is σ = 3199426560.
Its totient is φ = 954815112.
The previous prime is 2021012101. The next prime is 2021012107. The reversal of 2021012102 is 2012101202.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2021012101) 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, 54878 + ... + 83985.
It is an arithmetic number, because the mean of its divisors is an integer number (199964160).
Almost surely, 22021012102 is an apocalyptic number.
2021012102 is a deficient number, since it is larger than the sum of its proper divisors (1178414458).
2021012102 is a wasteful number, since it uses less digits than its factorization.
2021012102 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 139267.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 2021012102 is about 44955.6681854469.
The cubic root of 2021012102 is about 1264.3179525642.
Adding to 2021012102 its reverse (2012101202), we get a palindrome (4033113304).
The spelling of 2021012102 in words is "two billion, twenty-one million, twelve thousand, one hundred two".