212121203010 has 32 divisors (see below), whose sum is σ = 509358825792. Its totient is φ = 56535883200.

The previous prime is 212121202973. The next prime is 212121203033. The reversal of 212121203010 is 10302121212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1802704 + ... + 1916763.

It is an arithmetic number, because the mean of its divisors is an integer number (15917463306).

Almost surely, 2^212121203010 is an apocalyptic number.

212121203010 is an abundant number, since it is smaller than the sum of its proper divisors (297237622782).

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

212121203010 is a wasteful number, since it uses less digits than its factorization.

212121203010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721378.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212121203010 its reverse (10302121212), we get a palindrome (222423324222).

The spelling of 212121203010 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred three thousand, ten".