20120001212 has 6 divisors (see below), whose sum is σ = 35210002128. Its totient is φ = 10060000604.

The previous prime is 20120001173. The next prime is 20120001241. The reversal of 20120001212 is 21210002102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20120001193 and 20120001202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515000148 + ... + 2515000155.

It is an arithmetic number, because the mean of its divisors is an integer number (5868333688).

Almost surely, 2^20120001212 is an apocalyptic number.

It is an amenable number.

20120001212 is a deficient number, since it is larger than the sum of its proper divisors (15090000916).

20120001212 is a wasteful number, since it uses less digits than its factorization.

20120001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030000307 (or 5030000305 counting only the distinct ones).

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

Adding to 20120001212 its reverse (21210002102), we get a palindrome (41330003314).

The spelling of 20120001212 in words is "twenty billion, one hundred twenty million, one thousand, two hundred twelve".