121211000012 has 6 divisors (see below), whose sum is σ = 212119250028. Its totient is φ = 60605500004.

The previous prime is 121210999999. The next prime is 121211000041. The reversal of 121211000012 is 210000112121.

It is a junction number, because it is equal to n+sod(n) for n = 121210999957 and 121211000002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15151374998 + ... + 15151375005.

It is an arithmetic number, because the mean of its divisors is an integer number (35353208338).

Almost surely, 2^121211000012 is an apocalyptic number.

It is an amenable number.

121211000012 is a deficient number, since it is larger than the sum of its proper divisors (90908250016).

121211000012 is a wasteful number, since it uses less digits than its factorization.

121211000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302750007 (or 30302750005 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121211000012 its reverse (210000112121), we get a palindrome (331211112133).

The spelling of 121211000012 in words is "one hundred twenty-one billion, two hundred eleven million, twelve", and thus it is an aban number.