102021212121202 has 64 divisors (see below), whose sum is σ = 168323005888128. Its totient is φ = 45991649664000.

The previous prime is 102021212121193. The next prime is 102021212121209. The reversal of 102021212121202 is 202121212120201.

It is a self number, because there is not a number n which added to its sum of digits gives 102021212121202.

It is not an unprimeable number, because it can be changed into a prime (102021212121209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4726037853 + ... + 4726059439.

It is an arithmetic number, because the mean of its divisors is an integer number (2630046967002).

Almost surely, 2^{102021212121202} is an apocalyptic number.

102021212121202 is a deficient number, since it is larger than the sum of its proper divisors (66301793766926).

102021212121202 is a wasteful number, since it uses less digits than its factorization.

102021212121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24955.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102021212121202 its reverse (202121212120201), we get a palindrome (304142424241403).

The spelling of 102021212121202 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred two".