212121112101010 has 64 divisors (see below), whose sum is σ = 482120209838592. Its totient is φ = 65473114899456.

The previous prime is 212121112100957. The next prime is 212121112101049. The reversal of 212121112101010 is 10101211121212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3875038617 + ... + 3875093356.

It is an arithmetic number, because the mean of its divisors is an integer number (7533128278728).

Almost surely, 2^{212121112101010} is an apocalyptic number.

212121112101010 is an abundant number, since it is smaller than the sum of its proper divisors (269999097737582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121112101010 is a wasteful number, since it uses less digits than its factorization.

212121112101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7750132027.

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

Adding to 212121112101010 its reverse (10101211121212), we get a palindrome (222222323222222).

The spelling of 212121112101010 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, one hundred one thousand, ten".