102012012021 has 16 divisors (see below), whose sum is σ = 137523342528. Its totient is φ = 67255920000.

The previous prime is 102012012017. The next prime is 102012012041. The reversal of 102012012021 is 120210210201.

It is not a de Polignac number, because 102012012021 - 2² = 102012012017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102012011988 and 102012012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012012041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63246 + ... + 456096.

It is an arithmetic number, because the mean of its divisors is an integer number (8595208908).

Almost surely, 2^102012012021 is an apocalyptic number.

It is an amenable number.

102012012021 is a deficient number, since it is larger than the sum of its proper divisors (35511330507).

102012012021 is a wasteful number, since it uses less digits than its factorization.

102012012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393812.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102012012021 its reverse (120210210201), we get a palindrome (222222222222).

The spelling of 102012012021 in words is "one hundred two billion, twelve million, twelve thousand, twenty-one".