20211211001212 has 48 divisors (see below), whose sum is σ = 44533793525760. Its totient is φ = 7796532456000.

The previous prime is 20211211001197. The next prime is 20211211001213. The reversal of 20211211001212 is 21210011211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211211001213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324824412 + ... + 324886627.

It is an arithmetic number, because the mean of its divisors is an integer number (927787365120).

Almost surely, 2^{20211211001212} is an apocalyptic number.

20211211001212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20211211001212 is an abundant number, since it is smaller than the sum of its proper divisors (24322582524548).

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

20211211001212 is a wasteful number, since it uses less digits than its factorization.

20211211001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649711162 (or 649711160 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211211001212 its reverse (21210011211202), we get a palindrome (41421222212414).

The spelling of 20211211001212 in words is "twenty trillion, two hundred eleven billion, two hundred eleven million, one thousand, two hundred twelve".