20001210212 has 24 divisors (see below), whose sum is σ = 35614621560. Its totient is φ = 9825960960.

The previous prime is 20001210191. The next prime is 20001210239. The reversal of 20001210212 is 21201210002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1503578176 + 18497632036 = 38776^2 + 136006^2 .

It is a super-2 number, since 2×20001210212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001210193 and 20001210202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182558 + ... + 270794.

It is an arithmetic number, because the mean of its divisors is an integer number (1483942565).

Almost surely, 2^20001210212 is an apocalyptic number.

It is an amenable number.

20001210212 is a deficient number, since it is larger than the sum of its proper divisors (15613411348).

20001210212 is a wasteful number, since it uses less digits than its factorization.

20001210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89231 (or 89229 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20001210212 its reverse (21201210002), we get a palindrome (41202420214).

The spelling of 20001210212 in words is "twenty billion, one million, two hundred ten thousand, two hundred twelve".