212030121040 has 20 divisors (see below), whose sum is σ = 492970031604. Its totient is φ = 84812048384.

The previous prime is 212030120977. The next prime is 212030121041. The reversal of 212030121040 is 40121030212.

It can be written as a sum of positive squares in 2 ways, for example, as 42888753216 + 169141367824 = 207096^2 + 411268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212030121041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1325188177 + ... + 1325188336.

Almost surely, 2^212030121040 is an apocalyptic number.

212030121040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212030121040 is an abundant number, since it is smaller than the sum of its proper divisors (280939910564).

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

212030121040 is a wasteful number, since it uses less digits than its factorization.

212030121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650376526 (or 2650376520 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212030121040 its reverse (40121030212), we get a palindrome (252151151252).

The spelling of 212030121040 in words is "two hundred twelve billion, thirty million, one hundred twenty-one thousand, forty".