421200211321212 has 12 divisors (see below), whose sum is σ = 982800493082856. Its totient is φ = 140400070440400.

The previous prime is 421200211321163. The next prime is 421200211321223. The reversal of 421200211321212 is 212123112002124.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×421200211321212² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17550008805039 + ... + 17550008805062.

It is an arithmetic number, because the mean of its divisors is an integer number (81900041090238).

Almost surely, 2^{421200211321212} is an apocalyptic number.

It is an amenable number.

421200211321212 is an abundant number, since it is smaller than the sum of its proper divisors (561600281761644).

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

421200211321212 is a wasteful number, since it uses less digits than its factorization.

421200211321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35100017610108 (or 35100017610106 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 421200211321212 its reverse (212123112002124), we get a palindrome (633323323323336).

The spelling of 421200211321212 in words is "four hundred twenty-one trillion, two hundred billion, two hundred eleven million, three hundred twenty-one thousand, two hundred twelve".