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311021120212 = 22117068661823
BaseRepresentation
bin1001000011010100100…
…11011010101011010100
31002201210121002221110121
410201222103122223110
520043432401321322
6354514154001324
731320251621215
oct4415223325324
91081717087417
10311021120212
1110a9a3350010
1250340416244
132343823c50a
14110a6b4d40c
158155020ec7
hex486a4daad4

311021120212 has 12 divisors (see below), whose sum is σ = 593767593216. Its totient is φ = 141373236440.

The previous prime is 311021120173. The next prime is 311021120213. The reversal of 311021120212 is 212021120113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311021120213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3534330868 + ... + 3534330955.

It is an arithmetic number, because the mean of its divisors is an integer number (49480632768).

Almost surely, 2311021120212 is an apocalyptic number.

It is an amenable number.

311021120212 is a deficient number, since it is larger than the sum of its proper divisors (282746473004).

311021120212 is a wasteful number, since it uses less digits than its factorization.

311021120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7068661838 (or 7068661836 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 311021120212 its reverse (212021120113), we get a palindrome (523042240325).

Subtracting from 311021120212 its reverse (212021120113), we obtain a palindrome (99000000099).

The spelling of 311021120212 in words is "three hundred eleven billion, twenty-one million, one hundred twenty thousand, two hundred twelve".

Divisors: 1 2 4 11 22 44 7068661823 14137323646 28274647292 77755280053 155510560106 311021120212