212112110021010 has 128 divisors (see below), whose sum is σ = 530176474220544. Its totient is φ = 54250566881280.

The previous prime is 212112110020901. The next prime is 212112110021017. The reversal of 212112110021010 is 10120011211212.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (212112110021017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1798766572 + ... + 1798884488.

It is an arithmetic number, because the mean of its divisors is an integer number (4142003704848).

Almost surely, 2^{212112110021010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112110021010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265088237110272).

212112110021010 is an abundant number, since it is smaller than the sum of its proper divisors (318064364199534).

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

212112110021010 is a wasteful number, since it uses less digits than its factorization.

212112110021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135188.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212112110021010 its reverse (10120011211212), we get a palindrome (222232121232222).

The spelling of 212112110021010 in words is "two hundred twelve trillion, one hundred twelve billion, one hundred ten million, twenty-one thousand, ten".