20121023212 has 6 divisors (see below), whose sum is σ = 35211790628. Its totient is φ = 10060511604.

The previous prime is 20121023173. The next prime is 20121023233. The reversal of 20121023212 is 21232012102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515127898 + ... + 2515127905.

Almost surely, 2^20121023212 is an apocalyptic number.

It is an amenable number.

20121023212 is a deficient number, since it is larger than the sum of its proper divisors (15090767416).

20121023212 is a wasteful number, since it uses less digits than its factorization.

20121023212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030255807 (or 5030255805 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121023212 its reverse (21232012102), we get a palindrome (41353035314).

It can be divided in two parts, 201210 and 23212, that added together give a palindrome (224422).

The spelling of 20121023212 in words is "twenty billion, one hundred twenty-one million, twenty-three thousand, two hundred twelve".