102111222012021 has 24 divisors (see below), whose sum is σ = 148655809954080. Its totient is φ = 67538173341600.

The previous prime is 102111222012011. The next prime is 102111222012029. The reversal of 102111222012021 is 120210222111201.

It is not a de Polignac number, because 102111222012021 - 2¹⁵ = 102111221979253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102111222011985 and 102111222012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111222012029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5582590 + ... + 15342351.

It is an arithmetic number, because the mean of its divisors is an integer number (6193992081420).

Almost surely, 2^{102111222012021} is an apocalyptic number.

It is an amenable number.

102111222012021 is a deficient number, since it is larger than the sum of its proper divisors (46544587942059).

102111222012021 is a wasteful number, since it uses less digits than its factorization.

102111222012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929217 (or 20929214 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102111222012021 its reverse (120210222111201), we get a palindrome (222321444123222).

The spelling of 102111222012021 in words is "one hundred two trillion, one hundred eleven billion, two hundred twenty-two million, twelve thousand, twenty-one".