20211212110212 has 72 divisors (see below), whose sum is σ = 54140210855640. Its totient is φ = 6346105274880.

The previous prime is 20211212110151. The next prime is 20211212110277. The reversal of 20211212110212 is 21201121211202.

20211212110212 is a `hidden beast` number, since 20 + 211 + 212 + 1 + 10 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 294842484036 + 19916369626176 = 542994^2 + 4462776^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236047423 + ... + 236133030.

It is an arithmetic number, because the mean of its divisors is an integer number (751947372995).

Almost surely, 2^{20211212110212} is an apocalyptic number.

It is an amenable number.

20211212110212 is an abundant number, since it is smaller than the sum of its proper divisors (33928998745428).

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

20211212110212 is a wasteful number, since it uses less digits than its factorization.

20211212110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472180533 (or 472180528 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20211212110212 its reverse (21201121211202), we get a palindrome (41412333321414).

The spelling of 20211212110212 in words is "twenty trillion, two hundred eleven billion, two hundred twelve million, one hundred ten thousand, two hundred twelve".