102120021020210 has 8 divisors (see below), whose sum is σ = 183816037836396. Its totient is φ = 40848008408080.

The previous prime is 102120021020179. The next prime is 102120021020261. The reversal of 102120021020210 is 12020120021201.

It can be written as a sum of positive squares in 2 ways, for example, as 101502622672201 + 617398348009 = 10074851^2 + 785747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5106001051001 + ... + 5106001051020.

Almost surely, 2^{102120021020210} is an apocalyptic number.

102120021020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102120021020210 is a deficient number, since it is larger than the sum of its proper divisors (81696016816186).

102120021020210 is a wasteful number, since it uses less digits than its factorization.

102120021020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10212002102028.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102120021020210 its reverse (12020120021201), we get a palindrome (114140141041411).

Subtracting from 102120021020210 its reverse (12020120021201), we obtain a palindrome (90099900999009).

The spelling of 102120021020210 in words is "one hundred two trillion, one hundred twenty billion, twenty-one million, twenty thousand, two hundred ten".