10211212202220 has 72 divisors (see below), whose sum is σ = 30978896990496. Its totient is φ = 2722560325632.

The previous prime is 10211212202203. The next prime is 10211212202221. The reversal of 10211212202220 is 2220221211201.

It is a happy number.

10211212202220 is a `hidden beast` number, since 1 + 0 + 211 + 212 + 20 + 2 + 220 = 666.

10211212202220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 10211212202193 and 10211212202202.

It is not an unprimeable number, because it can be changed into a prime (10211212202221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3330037 + ... + 5613516.

Almost surely, 2^{10211212202220} is an apocalyptic number.

10211212202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211212202220 is an abundant number, since it is smaller than the sum of its proper divisors (20767684788276).

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

10211212202220 is a wasteful number, since it uses less digits than its factorization.

10211212202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8949911 (or 8949906 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 10211212202220 its reverse (2220221211201), we get a palindrome (12431433413421).

The spelling of 10211212202220 in words is "ten trillion, two hundred eleven billion, two hundred twelve million, two hundred two thousand, two hundred twenty".